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Valacyclovir 1 g Tablet, Film Coated, 14-count — NDC 43063-0771-14 package photo

Valacyclovir 1 g Tablet, Film Coated, 14-count

by PD-Rx Pharmaceuticals, Inc. · 14 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (43063-771-14)
NDC 43063-0771-14
🏷️ FDA NDC (as labeled) 43063-771-14 billing pads the product segment with a zero
This package
Contains14-count Pack sizes4 compare ↓
Also priced by: Part D plans $0.4291/unit — full pricing hub ↓
Also comes in: 6 tablets 43063-0771-06 20 tablets 43063-0771-20 21 tablets 43063-0771-21
Rx only Generic On market Non-controlled
🗂️ Data synced Sep 10, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

This page is curated, coded, and maintained by

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

🆔 Identity & classification

FDA NDC (as labeled) 43063-771-14
Product NDC 43063-771
11-digit billing NDC 43063077114
NCPDP billing unit EA — each (per item)
RxCUI 313564
UNII G447S0T1VC
UPC 0343063771211
Application # ANDA203047
SPL Set ID 1b11361c-5444-498b-ab7c-fbad917705ae
Established class (EPC) Herpes Simplex Virus Nucleoside Analog DNA Polymerase Inhibitor; Herpes Zoster Virus Nucleoside Analog DNA Polymerase Inhibitor; Herpesvirus Nucleoside Analog DNA Polymerase Inhibitor; Nucleoside Analog [
Mechanism of action DNA Polymerase Inhibitors
DEA schedule Non-controlled
Marketing category ANDA
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2015-05-25
Route ORAL
Dosage form TABLET, FILM COATED
Substance VALACYCLOVIR HYDROCHLORIDE
GPI-14 12405085100320
GPI class valACYclovir HCl
GCN Seq No 030607
GCN 13742
HICL code 010117
Ingredient (HICL) Valacyclovir Hcl
HIC1 code W
Therapeutic class — broad (HIC1) Anti-Infecting Agents
HIC2 code W5
Therapeutic class — intermediate (HIC2) Antiviral Agents
HIC3 code W5A
Therapeutic class — specific (HIC3) Antivirals, General
AHFS code 08:18.32.00
AHFS class Nucleoside And Nucleotide Antivirals
FDB label name VALACYCLOVIR HCL 1 GRAM TABLET
FDB brand name Valacyclovir
Legend status F — Federal legend — prescription drug or device
TE code (Orange Book) AB · RLD · RS
Why two NDCs? The FDA registers this code as 43063-771-14 — a 5-3-2 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the product segment → 43063-0771-14. Same drug, same package — only the format differs.
Where does this data come from?
Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.

🏷️ RxNorm drug class

This medicine belongs to the Herpesvirus Nucleoside Analog DNA Polymerase Inhibitor class.

Pharmacologic class Herpesvirus Nucleoside Analog DNA Polymerase Inhibitor, Herpes Simplex Virus Nucleoside Analog DNA Polymerase Inhibitor, Herpes Zoster Virus Nucleoside Analog DNA Polymerase Inhibitor
Drug family (ATC) Nucleosides and nucleotides excl. reverse transcriptase inhibitors
How it works DNA Polymerase Inhibitors
Where does this data come from?
Therapeutic classes from RxNorm RxClass (U.S. National Library of Medicine) — Established Pharmacologic Class (FDA), ATC drug family (WHO) and mechanism of action, matched by this product’s RxCUI.

🏭 Manufacturer & labeler

LabelerPD-Rx Pharmaceuticals, Inc.
Application holderHETERO LABS LTD UNIT V
FDA applicationANDA203047 (ANDA)
Labeler code43063
First marketedMay 2015
Product typeHuman Prescription Drug
Portfolio831 products on file
The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).
Where does this data come from?
Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.

🩺 Clinical

Label name VALACYCLOVIR HCL 1 GRAM TABLET Ingredient Valacyclovir Hcl
📖 What it is MedlinePlus · NLM

Valacyclovir is used to treat certain viral infections including: herpes labialis (cold sores) varicella infections including herpes zoster (shingles) and chicken pox genital herpes (a sexually transmitted infection) It is in a class of medications called antivirals. It works by stopping the spread of the herpes virus in the body. Valacyclovir helps treat and control outbreaks of genital herpes but should be used with safe sexual practices. Valacyclovir will not cure genital herpes.

Read the full MedlinePlus article ↗
📗 Our plain-language guide HelloPharmacist
  • Unfortunately, no — valacyclovir controls the virus but doesn't eliminate it from your body. The herpes virus stays dormant in your nerve cells after the infection. What valacyclov...
  • Can valacyclovir cure my herpes infection for good?
  • The sooner the better — really. For cold sores, you should start at the very first tingle, itch, or burning sensation, before a blister even forms. For genital herpes outbreaks, st...
  • When should I start taking it during an outbreak?
📖 Read our full Valacyclovir guide →
Where does this data come from?
Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.

💊 What it looks like

Color white
ShapeCapsule
ImprintI;87
Size23 mm
ScoringScored — splits in 2
One label can cover several strengths, so colors may be combined — always confirm a loose pill against the dispensed prescription label or a pharmacist.
Where does this data come from?
Physical description (imprint, shape, color, scoring, coating) from this product’s FDA Structured Product Labeling (SPL), mirrored from DailyMed / openFDA.

🧪 Inactive Ingredients / Excipients

Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.

💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.

  • UNII OP1R32D61U
    Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
  • UNII 68401960MK
    Crospovidone is a synthetic polymer made from polyvinylpyrrolidone. It acts as a disintegrant, helping tablets break apart quickly in the stomach so the medicine dissolves and absorbs into the body.
  • UNII 3NXW29V3WO
    Hypromellose is a plant-based thickener made from cellulose. It's used in medicines as a binder to hold ingredients together, a coating for tablets, and a thickener for liquids.
  • UNII 70097M6I30
    Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
  • UNII 3WJQ0SDW1A
    Polyethylene glycol is a synthetic liquid or solid polymer used in medicines as a solvent, lubricant, and humectant. It helps dissolve active ingredients, reduces friction during manufacturing, and retains moisture in the final product.
  • UNII 6OZP39ZG8H
    Polysorbate 80 is a synthetic emulsifier derived from sorbitol and oleic acid. It helps mix oil and water-based ingredients together in medications and improves how the product disperses in the body.
  • UNII FZ989GH94E
    Povidone is a synthetic polymer made from a plastic-like material. It acts as a binder to hold tablet ingredients together and as a disintegrant to help the tablet break apart in your stomach so the medicine can be absorbed.
  • UNII 15FIX9V2JP
    Titanium dioxide is a bright white mineral powder commonly used as a colorant and opacifying agent. It makes pills and tablets white or lighter in color and helps make coatings non-transparent.

8 inactive ingredients listed in the exact product block matched to this NDC.

Where does this data come from?
Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.

Inactive ingredient FAQ

Are inactive ingredients the same for every manufacturer?
No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.
Why might an inactive ingredient be missing?
Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.
Can inactive ingredients matter?
Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.

💲 Pricing

A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.

Price systemPer eachPer package
Retail pharmacies payNADAC · weekly Not in the retail survey — common for institutional, discontinued, or low-volume packs.
Medicaid paysCMS SDUD · 12 mo No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data.
Medicare drug plans payPart D · Q2 2026 $0.4291 $6.01 / 14 tablets
Where does this data come from?
NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.

🔁 Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Valacyclovir Hydrochloride 1 g 00378-4276-77 Mylan 90 tablets $0.405 AB Availability likely —
Valacyclovir Hydrochloride 1 g 50268-0789-15 AvPAK 1 tablet $0.405 AB Availability likely —
Valacyclovir 1 g 62135-0614-30 Chartwell 30 tablets $0.405 AB Availability likely —
Valacyclovir Hydrochloride 1 g 68084-0309-21 American 1 tablet $0.405 AB Availability likely —
Valacyclovir 1000 mg 69367-0263-09 Westminster 90 tablets $0.405 AB Availability likely —
Valacyclovir 1 g 82009-0041-90 Quallent 90 tablets $0.405 AB Availability likely —
Valacyclovir Hydrochloride 1 g 16714-0697-01 NorthStar 30 tablets $0.506 AB Discontinued —
Valtrex 1 g 00173-0565-04 GlaxoSmithKline 30 tablets $20.244 AB Availability likely —
Valacyclovir 1 g 31722-0705-01 Camber 100 tablets — AB FDA listed —
Valacyclovir 1 gthis 43063-0771-14 PD-Rx 14 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 49483-0691-01 TIME 100 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 50090-1173-00 A-S 15 tablets — AB FDA listed —
Valacyclovir 1 g 50090-2575-00 A-S 15 tablets — AB FDA listed —
Valacyclovir 1000 mg 50090-7270-00 A-S 15 tablets — AB FDA listed —
Valacyclovir 1000 mg 50090-7484-00 A-S 21 tablets — AB FDA listed —
Valacyclovir 1 g 51407-0108-30 Golden 30 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 51655-0703-21 Northwind 21 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 57237-0043-05 Rising 500 tablets — AB FDA listed —
valacyclovir hydrochloride 1 g 59746-0325-01 Jubilant 100 tablets — AB FDA listed —
Valacyclovir 1 g 60760-0469-42 St 42 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 60760-0757-42 St. 42 tablets — AB FDA listed —
valacyclovir hydrochloride 1 g 63187-0538-04 Proficient 4 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 63187-0776-04 Proficient 4 tablets — AB FDA listed —
Valacyclovir 1 g 63187-0950-04 Proficient 4 tablets — AB FDA listed —
Valacyclovir 1 g 63304-0905-03 SUN 10 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 65862-0449-01 Aurobindo 100 tablets — AB FDA listed —
Valacyclovir 1 g 67046-1347-03 Coupler 30 tablets — AB FDA listed —
Valacyclovir 1 g 67296-1297-01 RedPharm 21 tablets — AB Discontinued —
Valacyclovir 1000 mg 67296-2146-01 Redpharm 21 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 68071-1548-03 NuCare 30 tablets — AB FDA listed —
Valacyclovir 1000 mg 68071-3624-03 NuCare 30 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 68071-4727-02 NuCare 2 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 68071-4728-01 NuCare 21 tablets — AB FDA listed —
Valacyclovir 1 g 68071-4805-01 NuCare 90 tablets — AB FDA listed —
Valacyclovir 1 g 68788-7587-00 Preferred 6 tablets — AB FDA listed —
Valacyclovir 1000 mg 68788-8705-00 Preferred 6 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 68788-8820-00 Preferred 6 tablets — AB FDA listed —
Valacyclovir 1 g 69117-0011-01 Yiling 30 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 70518-0541-01 REMEDYREPACK 14 tablets — AB FDA listed —
Valtrex 1 g 70518-2039-01 REMEDYREPACK 14 tablets — AB FDA listed —
Valacyclovir 1 g 70518-2402-01 REMEDYREPACK 4 tablets — AB Discontinued —
Valacyclovir Hydrochloride 1 g 70518-3359-00 REMEDYREPACK 4 tablets — AB Discontinued —
Valacyclovir 1000 mg 70518-4100-00 REMEDYREPACK 30 tablets — AB FDA listed —
Valacyclovir 1 g 71335-0630-00 Bryant 60 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 71335-1862-00 Bryant 60 tablets — AB FDA listed —
Valacyclovir 1000 mg 71335-2534-00 Bryant 60 tablets — AB FDA listed —
Valacyclovir 1000 mg 72189-0594-04 Direct 4 tablets — AB FDA listed —
Valacyclovir 1 g 72789-0452-21 PD-Rx 21 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 76420-0600-02 Asclemed 2 tablets — AB FDA listed —
Valacyclovir 1000 mg 82804-0006-06 Proficient 6 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 82804-0093-10 Proficient 10 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 82868-0106-21 Northwind 21 tablets — AB FDA listed —
Valacyclovir Hydrochloride 1 g 85766-0026-01 Sportpharm 100 tablets — AB FDA listed —
About this product: this is a generic version of the medicine. FDA equivalence ratings are shown when available, and other versions are listed above, least expensive first.
Where does this data come from?
Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.

⏳ Availability & generic status

🏛️
2015
On the market since
May 2015
📍
2026
Currently FDA-listed
11 years listed
🔓
·
Generic on the market
this product is a generic
✅This is a generic drug

This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.

Where does this data come from?
Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.

📊 Medicare Part D spend CMS · PART D · 2026 (Q1)

Medicare Part D (outpatient prescription) spending for Valacyclovir — the program that covers self-administered drugs. 12 manufacturers.
⚠️ Drug-level data: CMS publishes Part D spending by drug, not by NDC — these figures combine every manufacturer, strength and package size sold under the name Valacyclovir. That’s a different level of aggregation than the Medicaid card above, which is specific to this exact 11-digit NDC (pack size included), so the two aren’t directly comparable.
Period
Total Part D spend
$28.02M
Claims incl. refills
952.8K
Beneficiaries
727.1K
Spend / beneficiary
$38.54
Spend / claim
$29.41
Trend by period
💵 About the dollar figures: spending is what Part D plans paid before confidential manufacturer rebates, so the program’s real net cost is lower. A blank patient count means fewer than 11 people — CMS hides counts that small to protect privacy. Source: CMS Medicare Quarterly Part D Spending by Drug (data.cms.gov), updated quarterly.

🔬 Reported adverse events (FAERS)

Read carefully: FAERS reports are voluntary and unverified. Counts are not incidence, do not establish causation, are subject to reporting bias, and cannot be used to compare one drug to another. Shown for signal context only. Reports for Valacyclovir — the ingredient across all brands.

Top reported reactions

Fatigue4,317
Nausea3,985
Diarrhoea3,648
Headache2,964
Pyrexia2,753
Pain2,709
Pneumonia2,436

Age at onset

Neonate88
Infant20
Child78
Adolescent127
Adult6,940
Elderly6,504

Reporter sex

70,056 reports
Male · 40%
Female · 60%
Unknown · 0%

Serious outcomes

Hospitalization26,094
Life-threatening3,284
Reports over time (by year) — tap or hover for the count & year
2020 2022 2024 2026 6,514 0
Most recent year is provisional (FAERS lags ~3 months).
Where does this data come from?
Adverse-event reports from the FDA Adverse Event Reporting System (FAERS) via openFDA. FAERS reports are voluntary and unverified — counts are not incidence and don’t establish causation.

📦 Packaging — all sizes for this product

Package NDCDescription Marketing startStatus
43063-0771-06 6 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (43063-771-06) 2017-06-08 Active
43063-0771-14 You're viewing this 14 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (43063-771-14) 2018-03-23 Active
43063-0771-20 20 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (43063-771-20) 2018-03-26 Active
43063-0771-21 21 TABLET, FILM COATED in 1 BOTTLE, PLASTIC (43063-771-21) 2017-08-11 Active

You're viewing one of 4 pack sizes for this product.

Pack size FAQ

What quantity is in NDC 43063-0771-14?
NDC 43063-0771-14 is a 14-count package — 14 tablet, film coated in 1 bottle, plastic.
What is the difference between NDC 43063-0771-14 and NDC 43063-0771-06?
Both are Valacyclovir 1 g Tablet, Film Coated — the drug itself is identical. NDC 43063-0771-14 is the 14-count package, while NDC 43063-0771-06 is the 6 tablets package.
What NDC number is used to bill for this package of Valacyclovir 1 g Tablet, Film Coated?
Bill NDC 43063-0771-14 — the 11-digit billing format is 43063077114. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.

🧭 About this NDC listing & data coverage

Finished prescription product
What data is (and isn’t) available for this NDC — tap to expand
NDC identity (package / product / labeler codes) ✓ Available
Labeler ✓ Available
Product & package description ✓ Available
Marketing category & status ✓ Available
Active ingredient / dosage form / route ✓ Available
FDA label (SPL via DailyMed) ✓ Available
Package photos ✓ Available
Inactive ingredients (structured) ✓ Available
NADAC pharmacy acquisition price (CMS) — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey.
Orange Book / therapeutic-equivalence data ✓ Available
HCPCS J-code billing crosswalk — Not published for this NDC Most self-administered / retail products have no J-code — that is normal.
Medicaid utilization (CMS SDUD) — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold.
“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.

Questions about this listing

Why is there no price listed?
The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.
Is the NDC printed on the package the same as the 11-digit billing NDC?
Yes, they identify this exact package in different formats. The FDA registers it as 43063-771-14, which is what is printed on the packaging and shown on DailyMed. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero: 43063-0771-14, written without dashes as 43063077114. The Identity section at the top of this page lists every form of this code.
What do the three segments of this NDC mean?
In 43063-0771-14, the first segment (43063) is the labeler code FDA assigned to PD-Rx Pharmaceuticals, Inc.; the middle segment (0771) identifies this specific product — its ingredient, strength, and dosage form; and the last segment (14) identifies this exact package size and type. Together they name one specific package of one specific product.
Is this package still being marketed?
Yes, per the latest FDA NDC Directory data on this page: this package is listed as actively marketed, with no marketing end date reported by PD-Rx Pharmaceuticals, Inc.. Listing status can change — the directory data on this page refreshes weekly.
Does this product come in other package sizes?
Yes — the FDA directory lists 3 other package presentations of this same product, including 6 tablets (43063-0771-06), 20 tablets (43063-0771-20), 21 tablets (43063-0771-21). Each has its own NDC and its own page — see the package list near the top of this page.
Who lists this product with the FDA?
PD-Rx Pharmaceuticals, Inc. is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.
Do I need a prescription for this product?
This NDC is listed with FDA as a prescription product, so it is dispensed under a prescriber's order. Your pharmacist can tell you whether any over-the-counter forms of the same medication exist.
This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.
Where does this data come from?
Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.

📄 Full prescribing information FDA SPL

The complete FDA label for this product — the official prescribing information, verbatim, section by section. Jump with a chip, search within the label, or expand everything.
🎯 Indications and Usage ⏱️ Dosage and Administration 💊 Dosage Forms and Strengths ⛔ Contraindications ⚠️ Warnings and Cautions 🤒 Adverse Reactions 🔄 Drug Interactions 👥 Use in Specific Populations 🧒 Pediatric Use 🧓 Geriatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 🧬 Mechanism of Action 📦 How Supplied / Storage and Handling 📋 Description 💬 Information for Patients
🎯 Indications and Usage ~3 min read ▾

1 INDICATIONS AND USAGE Valacyclovir tablet is a deoxynucleoside analogue DNA polymerase inhibitor indicated for: Adult Patients ( 1.1 ) • Cold Sores (Herpes Labialis) • Genital Herpes • Treatment in immunocompetent patients (initial or recurrent episode) • Suppression in immunocompetent or HIV-1-infected patients • Reduction of transmission • Herpes Zoster Pediatric Patients ( 1.2 ) • Cold Sores (Herpes Labialis) • Chickenpox Limitations of Use ( 1.3 ) The efficacy and safety of valacyclovir tablets have not been established in immunocompromised patients other than for the suppression of genital herpes in HIV-1-infected patients.

1.1Adult Patients Cold Sores (Herpes Labialis) Valacyclovir tablets are indicated for treatment of cold sores (herpes labialis). The efficacy of valacyclovir tablets initiated after the development of clinical signs of a cold sore (e.g., papule, vesicle, or ulcer) has not been established. Genital Herpes Initial Episode: Valacyclovir tablets are indicated for treatment of the initial episode of genital herpes in immunocompetent adults.

The efficacy of treatment with valacyclovir tablets when initiated more than 72 hours after the onset of signs and symptoms has not been established. Recurrent Episodes: Valacyclovir tablets are indicated for treatment of recurrent episodes of genital herpes in immunocompetent adults. The efficacy of treatment with valacyclovir tablets when initiated more than 24 hours after the onset of signs and symptoms has not been established.

Suppressive Therapy: Valacyclovir tablets are indicated for chronic suppressive therapy of recurrent episodes of genital herpes in immunocompetent and in HIV-1-infected adults. The efficacy and safety of valacyclovir tablets for the suppression of genital herpes beyond 1 year in immunocompetent patients and beyond 6 months in HIV-1-infected patients have not been established. Reduction of Transmission: Valacyclovir tablets are indicated for the reduction of transmission of genital herpes in immunocompetent adults.

The efficacy of valacyclovir tablets for the reduction of transmission of genital herpes beyond 8 months in discordant couples has not been established. The efficacy of valacyclovir tablets for the reduction of transmission of genital herpes in individuals with multiple partners and non-heterosexual couples has not been established. Safer sex practices should be used with suppressive therapy (see current Centers for Disease Control and Prevention [CDC] Sexually Transmitted Diseases Treatment Guidelines ).

Herpes Zoster Valacyclovir tablets are indicated for the treatment of herpes zoster (shingles) in immunocompetent adults. The efficacy of valacyclovir tablets when initiated more than 72 hours after the onset of rash and the efficacy and safety of valacyclovir tablets for treatment of disseminated herpes zoster have not been established.

1.2Pediatric Patients Cold Sores (Herpes Labialis) Valacyclovir tablets are indicated for the treatment of cold sores (herpes labialis) in pediatric patients aged greater than or equal to 12 years. The efficacy of valacyclovir tablets initiated after the development of clinical signs of a cold sore (e.g., papule, vesicle, or ulcer) has not been established. Chickenpox Valacyclovir tablets are indicated for the treatment of chickenpox in immunocompetent pediatric patients aged 2 to less than 18 years.

Based on efficacy data from clinical trials with oral acyclovir, treatment with valacyclovir tablets should be initiated within 24 hours after the onset of rash [see Clinical Studies ( 14.4 )].

1.3Limitations of Use The efficacy and safety of valacyclovir tablets have not been established in: • Immunocompromised patients other than for the suppression of genital herpes in HIV-1−infected patients with a CD4+ cell count greater than or equal to 100 cells/mm 3 . • Patients aged less than 12 years with cold sores (herpes labialis). • Patients aged less than 2 years or greater than or equal to 18 years…

⏱️ Dosage and Administration ~3 min read ▾

2 DOSAGE AND ADMINISTRATION • Valacyclovir tablets may be given without regard to meals. • Valacyclovir oral suspension (25 mg/mL or 50 mg/mL) may be prepared extemporaneously from 500-mg valacyclovir tablets for use in pediatric patients for whom a solid dosage form is not appropriate [see Dosage and Administration ( 2.3 )]. Adult Dosage ( 2.1 ) Cold Sores 2 grams every 12 hours for 1 day Genital Herpes Initial episode 1 gram twice daily for 10 days Recurrent episodes 500 mg twice daily for 3 days Suppressive therapy Immunocompetent patients 1 gram once daily Alternate dose in patients with less than or equal to 9 recurrences/year 500 mg once daily HIV-1-infected patients 500 mg twice daily Reduction of transmission 500 mg once daily Herpes Zoster 1 gram 3 times daily for 7 days Pediatric Dosage ( 2.2 ) Cold Sores (aged greater than or equal to 12 years) 2 grams every 12 hours for 1 day Chickenpox (aged 2 to less than 18 years) 20 mg/kg 3 times daily for 5 days; not to exceed 1 gram 3 times daily Valacyclovir oral suspension (25 mg/mL or 50 mg/mL) can be prepared from the 500 mg valacyclovir tablets.

( 2.3 )

2.1Adult Dosing Recommendations Cold Sores (Herpes Labialis) The recommended dosage of valacyclovir tablets for treatment of cold sores is 2 grams twice daily for 1 day taken 12 hours apart. Therapy should be initiated at the earliest symptom of a cold sore (e.g., tingling, itching, or burning). Genital Herpes Initial Episode: The recommended dosage of valacyclovir tablets for treatment of initial genital herpes is 1 gram twice daily for 10 days.

Therapy was most effective when administered within 48 hours of the onset of signs and symptoms. Recurrent Episodes: The recommended dosage of valacyclovir tablets for treatment of recurrent genital herpes is 500 mg twice daily for 3 days. Initiate treatment at the first sign or symptom of an episode.

Suppressive Therapy: The recommended dosage of valacyclovir tablets for chronic suppressive therapy of recurrent genital herpes is 1 gram once daily in patients with normal immune function. In patients with a history of 9 or fewer recurrences per year, an alternative dose is 500 mg once daily. In HIV-1-infected patients with a CD4+ cell count greater than or equal to 100 cells/mm 3 , the recommended dosage of valacyclovir tablets for chronic suppressive therapy of recurrent genital herpes is 500 mg twice daily.

Reduction of Transmission: The recommended dosage of valacyclovir tablets for reduction of transmission of genital herpes in patients with a history of 9 or fewer recurrences per year is 500 mg once daily for the source partner. Herpes Zoster The recommended dosage of valacyclovir tablets for treatment of herpes zoster is 1 gram 3 times daily for 7 days. Therapy should be initiated at the earliest sign or symptom of herpes zoster and is most effective when started within 48 hours of the onset of rash.

2.2Pediatric Dosing Recommendations Cold Sores (Herpes Labialis) The recommended dosage of valacyclovir tablets for the treatment of cold sores in pediatric patients aged greater than or equal to 12 years is 2 grams twice daily for 1 day taken 12 hours apart. Therapy should be initiated at the earliest symptom of a cold sore (e.g., tingling, itching, or burning). Chickenpox The recommended dosage of valacyclovir tablets for treatment of chickenpox in immunocompetent pediatric patients aged 2 to less than 18 years is 20 mg/kg administered 3 times daily for 5 days.

The total dose should not exceed 1 gram 3 times daily. Therapy should be initiated at the earliest sign or symptom [see Use in Specific Populations ( 8.4 ), Clinical Pharmacology ( 12.3 ), Clinical Studies ( 14.4 )].

2.3Extemporaneous Preparation of Oral Suspension Ingredients and Preparation per USP-NF valacyclovir tablets 500 mg, cherry flavor, and Suspension Structured Vehicle USP-NF (SSV). Valacyclovir oral suspension (25 mg/mL or 50 mg/mL) should be prepared in lots of 100 mL. Instructions for Preparing Suspensi…

💊 Dosage Forms and Strengths 63 words ▾

3 DOSAGE FORMS AND STRENGTHS Tablets: • 500 mg: blue, film-coated, capsule shaped tablets, debossed with 'I' on one side and '86' on other side. • 1 gm: white to off-white, film-coated, capsule shaped tablets, debossed with 'I' on one side and '87' on other side with partial scorebar on both sides. Tablets: 500 mg (unscored), 1 gram (partially scored) ( 3 )

⛔ Contraindications 57 words ▾

4 CONTRAINDICATIONS Valacyclovir tabletsare contraindicated in patients who have had a demonstrated clinically significant hypersensitivity reaction [e.g., anaphylaxis, severe cutaneous adverse reactions (SCARs)] to valacyclovir, acyclovir, or any component of the formulation [see Warnings and Precautions (5.4) , Adverse Reactions (6.3) ]. Hypersensitivity to valacyclovir (e.g., anaphylaxis), acyclovir, or any component of the formulation. ( 4 )

⚠️ Warnings and Cautions ~3 min read ▾

5 WARNINGS AND PRECAUTIONS • Thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS): Has occurred in patients with advanced HIV-1 disease and in allogenic bone marrow transplant and renal transplant patients receiving 8 grams per day of valacyclovir in clinical trials. Discontinue treatment if clinical symptoms and laboratory findings consistent with TTP/HUS occur. ( 5.1 ) • Acute renal failure: May occur in elderly patients (with or without reduced renal function), patients with underlying renal disease who receive higher- than-recommended doses of valacyclovir for their level of renal function, patients who receive concomitant nephrotoxic drugs, or inadequately hydrated patients.

Use with caution in elderly patients and reduce dosage in patients with renal impairment. ( 2.4 , 5.2 ) • Central nervous system adverse reactions (e.g., agitation, hallucinations, confusion, and encephalopathy): May occur in both adult and pediatric patients (with or without reduced renal function) and in patients with underlying renal disease who receive higher-than-recommended doses of valacyclovir for their level of renal function. Elderly patients are more likely to have central nervous system adverse reactions.

Use with caution in elderly patients and reduce dosage in patients with renal impairment. ( 2.4 , 5.3 ) • Severe cutaneous adverse reactions (SCARs): Including acute generalized exanthematous pustulosis (AGEP), drug reaction with eosinophilia and systemic symptoms (DRESS), toxic epidermal necrolysis (TEN), and Stevens-Johnson syndrome (SJS) have been reported during the postmarketing experience with valacyclovir. Discontinue valacyclovir immediately if a painful rash with mucosal involvement or a progressive severe rash develops, and closely monitor clinical status.

(5.4)

5.1Thrombotic Thrombocytopenic Purpura/Hemolytic Uremic Syndrome (TTP/HUS) TTP/HUS, in some cases resulting in death, has occurred in patients with advanced HIV-1 disease and also in allogeneic bone marrow transplant and renal transplant recipients participating in clinical trials of valacyclovir at doses of 8 grams per day. Treatment with valacyclovir should be stopped immediately if clinical signs, symptoms, and laboratory abnormalities consistent with TTP/HUS occur.

5.2Acute Renal Failure Cases of acute renal failure have been reported in: • Elderly patients with or without reduced renal function. Caution should be exercised when administering valacyclovir to geriatric patients, and dosage reduction is recommended for those with impaired renal function [see Dosage and Administration ( 2.4 ), Use in Specific Populations ( 8.5 )]. • Patients with underlying renal disease who received higher-than-recommended doses of valacyclovir for their level of renal function. Dosage reduction is recommended when administering valacyclovir to patients with renal impairment [see Dosage and Administration ( 2.4 ), Use in Specific Populations ( 8.6 )]. • Patients receiving other nephrotoxic drugs.

Caution should be exercised when administering valacyclovir to patients receiving potentially nephrotoxic drugs. • Patients without adequate hydration. Precipitation of acyclovir in renal tubules may occur when the solubility (2.5 mg/mL) is exceeded in the intratubular fluid. Adequate hydration should be maintained for all patients.

In the event of acute renal failure and anuria, the patient may benefit from hemodialysis until renal function is restored [see Dosage and Administration ( 2.4 ), Adverse Reactions ( 6.3 )].

5.3Central Nervous System Effects Central nervous system adverse reactions, including agitation, hallucinations, confusion, delirium, seizures, and encephalopathy, have been reported in both adult and pediatric patients with or without reduced renal function and in patients with underlying renal disease who received higher-than-recommended doses of valacyclovir for their level of renal function. Elderly patients are more likely to have central nervous syst…

🤒 Adverse Reactions ~3 min read ▾

6 ADVERSE REACTIONS The following serious adverse reactions are discussed in greater detail in other sections of the labeling: • Thrombotic Thrombocytopenic Purpura/Hemolytic Uremic Syndrome [see Warnings and Precautions ( 5.1 )]. • Acute Renal Failure [see Warnings and Precautions ( 5.2 )]. • Central Nervous System Effects [see Warnings and Precautions ( 5.3 )]. • Severe Cutaneous Adverse Reactions [see Warnings and Precautions ( 5.4 )]. The most common adverse reactions reported in at least 1 indication by greater than 10% of adult subjects treated with valacyclovir and observed more frequently with valacyclovir compared with placebo are headache, nausea, and abdominal pain.

The only adverse reaction reported in greater than 10% of pediatric subjects aged less than 18 years was headache. • The most common adverse reactions reported in at least one indication by greater than 10% of adult subjects treated with valacyclovir and more commonly than in subjects treated with placebo are headache, nausea, and abdominal pain. ( 6.1 ) • The only adverse reaction occurring in greater than 10% of pediatric subjects aged less than 18 years was headache. ( 6.2 ) To report SUSPECTED ADVERSE REACTIONS, contact Hetero Labs Limited at 1-866-495-1995 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1Clinical Trials Experience in Adult Subjects Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice. Cold Sores (Herpes Labialis) In clinical trials for the treatment of cold sores, the adverse reactions reported by subjects receiving valacyclovir 2 grams twice daily (n = 609) or placebo (n = 609) for 1 day, respectively, included headache (14%, 10%) and dizziness (2%, 1%).

The frequencies of abnormal ALT (greater than 2 x ULN) were 1.8% for subjects receiving valacyclovir compared with 0.8% for placebo. Other laboratory abnormalities (hemoglobin, white blood cells, alkaline phosphatase, and serum creatinine) occurred with similar frequencies in the 2 groups. Genital Herpes Initial Episode: In a clinical trial for the treatment of initial episodes of genital herpes, the adverse reactions reported by greater than or equal to 5% of subjects receiving valacyclovir 1 gram twice daily for 10 days (n = 318) or oral acyclovir 200 mg 5 times daily for 10 days (n = 318), respectively, included headache (13%, 10%) and nausea (6%, 6%).

For the incidence of laboratory abnormalities see Table 2. Recurrent Episodes: In 3 clinical trials for the episodic treatment of recurrent genital herpes, the adverse reactions reported by greater than or equal to 5% of subjects receiving valacyclovir 500 mg twice daily for 3 days (n = 402), valacyclovir 500 mg twice daily for 5 days (n = 1,136), or placebo (n = 259), respectively, included headache (16%, 11%, 14%) and nausea (5%, 4%, 5%). For the incidence of laboratory abnormalities see Table 2.

Suppressive Therapy: Suppression of Recurrent Genital Herpes in Immunocompetent Adults: In a clinical trial for the suppression of recurrent genital herpes infections, the adverse reactions reported by subjects receiving valacyclovir 1 gram once daily (n = 269), valacyclovir 500 mg once daily (n = 266), or placebo (n = 134), respectively, included headache (35%, 38%, 34%), nausea (11%, 11%, 8%), abdominal pain (11%, 9%, 6%), dysmenorrhea (8%, 5%, 4%), depression (7%, 5%, 5%), arthralgia (6%, 5%, 4%), vomiting (3%, 3%, 2%), and dizziness (4%, 2%, 1%).

For the incidence of laboratory abnormalities see Table 2. Suppression of Recurrent Genital Herpes in HIV-1-Infected Subjects: In HIV-1-infected subjects, frequently reported adverse reactions for valacyclovir (500 mg twice daily; n = 194, median days on therapy = 172) and placebo (n = 99, median days on therapy = 59), respectively, included headache (13%, 8%), fatigue (8%, 5%)…

🔄 Drug Interactions 20 words ▾

7 DRUG INTERACTIONS No clinically significant drug-drug or drug-food interactions with valacyclovir are known [see Clinical Pharmacology ( 12.3 )].

👥 Use in Specific Populations ~3 min read ▾

8 USE IN SPECIFIC POPULATIONS

8.1Pregnancy Risk Summary Clinical data over several decades with valacyclovir and its metabolite, acyclovir, in pregnant women, have not identified a drug associated risk of major birth defects. There are insufficient data on the use of valacyclovir regarding miscarriage or adverse maternal or fetal outcomes (see Data) . There are risks to the fetus associated with untreated herpes simplex during pregnancy (see Clinical Considerations).

In animal reproduction studies, no evidence of adverse developmental outcomes was observed with valacyclovir when administered to pregnant rats and rabbits at system exposures (AUC) 4 (rats) and 7 (rabbits) times the human exposure at the maximum recommended human dose (MRHD) (see Data). The estimated background risk of major birth defects and miscarriage for the indicated populations is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes.

In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk: The risk of neonatal HSV infection varies from 30% to 50% for genital HSV acquired in late pregnancy (third trimester), whereas with HSV acquisition in early pregnancy, the risk of neonatal infection is about 1%. A primary herpes occurrence during the first trimester of pregnancy has been associated with neonatal chorioretinitis, microcephaly, and, in rare cases, skin lesions.

In very rare cases, transplacental transmission can occur resulting in congenital infection, including microcephaly, hepatosplenomegaly, intrauterine growth restriction, and stillbirth. Co-infection with HSV increases the risk of perinatal HIV transmission in women who had a clinical diagnosis of genital herpes during pregnancy. Data Human Data: Clinical data over several decades with valacyclovir and its metabolite, acyclovir, in pregnant women, based on published literature, have not identified a drug-associated risk of major birth defects.

There are insufficient data on the use of valacyclovir regarding miscarriage or adverse maternal or fetal outcomes. The Acyclovir and the Valacyclovir Pregnancy Registries, both population-based international prospective studies, collected pregnancy data through April 1999. The Acyclovir Registry documented outcomes of 1,246 infants and fetuses exposed to acyclovir during pregnancy (756 with earliest exposure during the first trimester, 197 during the second trimester, 291 during the third trimester, and 2 unknown).

The occurrence of major birth defects during first-trimester exposure to acyclovir was 3.2% (95% CI: 2.0% to 5.0%) and during any trimester of exposure was 2.6% (95% CI: 1.8% to 3.8%). The Valacyclovir Pregnancy Registry documented outcomes of 111 infants and fetuses exposed to valacyclovir during pregnancy (28 with earliest exposure in the first trimester, 31 during the second trimester, and 52 during the third trimester).The occurrence of major birth defects during first-trimester exposure to valacyclovir was 4.5% (95% CI: 0.24% to 24.9%) and during any trimester of exposure was 3.9% (95% CI: 1.3% to 10.7%).

Available studies have methodological limitations including insufficient sample size to support conclusions about overall malformation risk or for making comparisons of the frequencies of specific birth defects. Animal Data: Valacyclovir was administered orally to pregnant rats and rabbits (up to 400 mg/kg/day) during organogenesis (Gestation Days 6 through 15, and 6 through 18, respectively). No adverse embryo-fetal effects were observed in rats and rabbits at acyclovir exposures (AUC) of up to approximately 4 (rats) and 7 (rabbits) times the exposure in humans at the MRHD.

Early embryo death, fetal growth retardation (weight and length), and variations in fetal skeletal development (primarily extra r…

🧒 Pediatric Use ~3 min read ▾

8.4Pediatric Use Valacyclovir is indicated for treatment of cold sores in pediatric patients aged greater than or equal to 12 years and for treatment of chickenpox in pediatric patients aged 2 to less than 18 years [see Indications and Usage ( 1.2 ), Dosage and Administration ( 2.2 )]. The use of valacyclovir for treatment of cold sores is based on 2 double-blind, placebo-controlled clinical trials in healthy adults and adolescents (aged greater than or equal to 12 years) with a history of recurrent cold sores [see Clinical Studies ( 14.1 )].

The use of valacyclovir tablets for treatment of chickenpox in pediatric patients aged 2 to less than 18 years is based on single-dose pharmacokinetic and multiple-dose safety data from an open-label trial with valacyclovir and supported by efficacy and safety data from 3 randomized, double-blind, placebo-controlled trials evaluating oral acyclovir in pediatric subjects with chickenpox [see Dosage and Administration ( 2.2 ), Adverse Reactions ( 6.2 ), Clinical Pharmacology ( 12.3 ), Clinical Studies ( 14.4 )]. The efficacy and safety of valacyclovir have not been established in pediatric patients: • aged less than 12 years with cold sores • aged less than 18 years with genital herpes • aged less than 18 years with herpes zoster • aged less than 2 years with chickenpox • for suppressive therapy following neonatal HSV infection.

The pharmacokinetic profile and safety of valacyclovir oral suspension in children aged less than 12 years were studied in 3 open-label trials. No efficacy evaluations were conducted in any of the 3 trials. Trial 1 was a single-dose pharmacokinetic, multiple-dose safety trial in 27 pediatric subjects aged 1 to less than 12 years with clinically suspected varicella-zoster virus (VZV) infection [see Dosage and Administration ( 2.2 ), Adverse Reactions ( 6.2 ), Clinical Pharmacology ( 12.3 ), Clinical Studies ( 14.4 )].

Trial 2 was a single-dose pharmacokinetic and safety trial in pediatric subjects aged 1 month to less than 6 years who had an active herpes virus infection or who were at risk for herpes virus infection. Fifty-seven subjects were enrolled and received a single dose of 25 mg/kg valacyclovir oral suspension. In infants and children aged 3 months to less than 6 years, this dose provided comparable systemic acyclovir exposures to that from a 1-gram dose of valacyclovir in adults (historical data).

In infants aged 1 month to less than 3 months, mean acyclovir exposures resulting from a 25-mg/kg dose were higher (C max : ↑30%, AUC: ↑60%) than acyclovir exposures following a 1-gram dose of valacyclovir in adults. Acyclovir is not approved for suppressive therapy in infants and children following neonatal HSV infections; therefore, valacyclovir is not recommended for this indication because efficacy cannot be extrapolated from acyclovir. Trial 3 was a single-dose pharmacokinetic, multiple-dose safety trial in 28 pediatric subjects aged 1 to less than 12 years with clinically suspected HSV infection.

None of the subjects enrolled in this trial had genital herpes. Each subject was dosed with valacyclovir oral suspension 10 mg/kg twice daily for 3 to 5 days. Acyclovir systemic exposures in pediatric subjects following valacyclovir oral suspension were compared with historical acyclovir systemic exposures in immunocompetent adults receiving the solid oral dosage form of valacyclovir or acyclovir for the treatment of recurrent genital herpes.

The mean projected daily acyclovir systemic exposures in pediatric subjects across all age-groups (1 to less than 12 years) were lower (C max : ↓20%, AUC: ↓33%) compared with the acyclovir systemic exposures in adults receiving valacyclovir 500 mg twice daily but were higher (daily AUC: ↑16%) than systemic exposures in adults receiving acyclovir 200 mg 5 times daily. Insufficient data are available to support valacyclovir for the treatment of recurrent genital herpes in this age-group because clinical information on recurrent…

🧓 Geriatric Use 98 words ▾

8.5Geriatric Use Of the total number of subjects in clinical trials of valacyclovir, 906 were 65 and over, and 352 were 75 and over. In a clinical trial of herpes zoster, the duration of pain after healing (post-herpetic neuralgia) was longer in subjects 65 and older compared with younger adults. Elderly patients are more likely to have reduced renal function and require dose reduction.

Elderly patients are also more likely to have renal or CNS adverse events [see Dosage and Administration ( 2.4 ), Warnings and Precautions ( 5.2 , 5.3 ), Clinical Pharmacology ( 12.3 )].

🆘 Overdosage 66 words ▾

10 OVERDOSAGE Caution should be exercised to prevent inadvertent overdose [see Use in Specific Populations ( 8.5 , 8.6 )]. Precipitation of acyclovir in renal tubules may occur when the solubility (2.5 mg/mL) is exceeded in the intratubular fluid. In the event of acute renal failure and anuria, the patient may benefit from hemodialysis until renal function is restored [see Dosage and Administration ( 2.4 )].

🧬 Clinical Pharmacology ~3 min read ▾

12 CLINICAL PHARMACOLOGY

12.1Mechanism of Action Valacyclovir is an antiviral drug active against α-herpes viruses [see Microbiology ( 12.4 )] .

12.3Pharmacokinetics The pharmacokinetics of valacyclovir and acyclovir after oral administration of valacyclovir have been investigated in 14 volunteer trials involving 283 adults and in 3 trials involving 112 pediatric subjects aged 1 month to less than 12 years. Pharmacokinetics in Adults Absorption and Bioavailability: After oral administration, valacyclovir hydrochloride is rapidly absorbed from the gastrointestinal tract and nearly completely converted to acyclovir and L -valine by first-pass intestinal and/or hepatic metabolism.

The absolute bioavailability of acyclovir after administration of valacyclovir is 54.5% ± 9.1% as determined following a 1-gram oral dose of valacyclovir and a 350-mg intravenous acyclovir dose to 12 healthy volunteers. Acyclovir bioavailability from the administration of valacyclovir is not altered by administration with food (30 minutes after an 873 Kcal breakfast, which included 51 grams of fat). Acyclovir pharmacokinetic parameter estimates following administration of valacyclovir to healthy adult volunteers are presented in Table 3.

There was a less than dose-proportional increase in acyclovir maximum concentration (C max ) and area under the acyclovir concentration-time curve (AUC) after single-dose and multiple-dose administration (4 times daily) of valacyclovir from doses between 250 mg to 1 gram. There is no accumulation of acyclovir after the administration of valacyclovir at the recommended dosage regimens in adults with normal renal function. Table 3.

Mean (±SD) Plasma Acyclovir Pharmacokinetic Parameters Following Administration of Valacyclovir to Healthy Adult Volunteers Dose Single-Dose Administration (N = 8) Multiple-Dose Administration a (N = 24, 8 per treatment arm) C max (±SD) (mcg/mL) AUC (±SD) (h ● mcg/mL) C max (±SD) (mcg/mL) AUC (±SD) (h ● mcg/mL) 100 mg 0.83 (±0.14) 2.28 (±0.40) ND ND 250 mg 2.15 (±0.50) 5.76 (±0.60) 2.11 (±0.33) 5.66 (±1.09) 500 mg 3.28 (±0.83) 11.59 (±1.79) 3.69 (±0.87) 9.88 (±2.01) 750 mg 4.17 (±1.14) 14.11 (±3.54) ND ND 1,000 mg 5.65 (±2.37) 19.52 (±6.04) 4.96 (±0.64) 15.70 (±2.27) a Administered 4 times daily for 11 days.

ND = not done. Distribution: The binding of valacyclovir to human plasma proteins ranges from 13.5% to 17.9%. The binding of acyclovir to human plasma proteins ranges from 9% to 33%.

Metabolism: Valacyclovir is converted to acyclovir and L -valine by first-pass intestinal and/or hepatic metabolism. Acyclovir is converted to a small extent to inactive metabolites by aldehyde oxidase and by alcohol and aldehyde dehydrogenase. Neither valacyclovir nor acyclovir is metabolized by cytochrome P450 enzymes.

Plasma concentrations of unconverted valacyclovir are low and transient, generally becoming non-quantifiable by 3 hours after administration. Peak plasma valacyclovir concentrations are generally less than 0.5 mcg/mL at all doses. After single-dose administration of 1 gram of valacyclovir, average plasma valacyclovir concentrations observed were 0.5, 0.4, and 0.8 mcg/mL in subjects with hepatic dysfunction, renal insufficiency, and in healthy subjects who received concomitant cimetidine and probenecid, respectively.

Elimination: The pharmacokinetic disposition of acyclovir delivered by valacyclovir is consistent with previous experience from intravenous and oral acyclovir. Following the oral administration of a single 1-gram dose of radiolabeled valacyclovir to 4 healthy subjects, 46% and 47% of administered radioactivity was recovered in urine and feces, respectively, over 96 hours. Acyclovir accounted for 89% of the radioactivity excreted in the urine.

Renal clearance of acyclovir following the administration of a single 1-gram dose of valacyclovir to 12 healthy subjects was approximately 255 ± 86 mL/min which represents 42% of total acyclovir apparent plasma clearance. The plasma eliminati…

🧬 Mechanism of Action 19 words ▾

12.1Mechanism of Action Valacyclovir is an antiviral drug active against α-herpes viruses [see Microbiology ( 12.4 )] .

📦 How Supplied / Storage and Handling 83 words ▾

16 HOW SUPPLIED/STORAGE AND HANDLING Valacyclovir Tablets USP, 1 gm are white to off-white, film-coated, capsule shaped tablets, debossed with 'I' on one side and '87' on other side with partial scorebar on both sides. They are supplied in Bottle of 6 NDC 43063-771-06 Bottle of 14 NDC 43063-771-14 Bottle of 20 NDC 43063-771-20 Bottle of 21 NDC 43063-771-21 Storage: Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature]. Dispense in a well-closed container as defined in the USP.

📋 Description 158 words ▾

11 DESCRIPTION Valacyclovir hydrochloride is the hydrochloride salt of the L -valyl ester of the antiviral drug acyclovir. Valacyclovir tablets, USP are for oral administration. Each tablet contains 556.0 mg or 1.112 grams of valacyclovir hydrochloride USP equivalent to 500 mg or 1 gm of valacyclovir, respectively, and the inactive ingredients crospovidone, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate 80, povidone, and titanium dioxide.

In addition to this 500 mg contains FD&C blue #2/ indigo carmine aluminum lake. The chemical name of valacyclovir hydrochloride is L -valine2-[(2-amino-1,6-dihydro-6-oxo-9 H -purin-9-yl)methoxy]ethyl ester hydrochloride monohydrate. It has the following structural formula: Valacyclovir hydrochloride USP (monohydrate) is a white or almost white powder with the molecular formula C 13 H 23 N 6 O 5 Cl and a molecular weight of 378.81.

Valacyclovir hydrochloride USP is freely soluble in water and practically insoluble in 1-octanol. The pka for valacyclovir hydrochloride is 5.95. FDA approved dissolution test specifications differ from USP. chemical-structure

💬 Information for Patients ~3 min read ▾

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information). Severe Cutaneous Adverse Reactions Inform patients that severe skin reactions including acute generalized exanthematous pustulosis (AGEP), drug reaction with eosinophilia and systemic symptoms (DRESS), toxic epidermal necrolysis (TEN), Stevens-Johnson syndrome (SJS), and erythema multiforme (EM) have been reported with valacyclovir. Advise patients to immediately contact their healthcare provider if they develop a rash.

Instruct patients to immediately stop taking valacyclovir and seek medical attention if a painful rash with mucosal involvement develops [see Contraindications (4) , Warnings and Precautions (5.4) , Adverse Reactions (6.3) ]. Importance of Adequate Hydration Patients should be advised to maintain adequate hydration. Missed Dose Instruct patients that if they miss a dose of valacyclovir, to take it as soon as they remember.

Advise patients not to double their next dose or take more than the prescribed dose. Cold Sores (Herpes Labialis) Patients should be advised to initiate treatment at the earliest symptom of a cold sore (e.g., tingling, itching, or burning). There are no data on the effectiveness of treatment initiated after the development of clinical signs of a cold sore (e.g., papule, vesicle, or ulcer).

Patients should be instructed that treatment for cold sores should not exceed 1 day (2 doses) and that their doses should be taken about 12 hours apart. Patients should be informed that valacyclovir is not a cure for cold sores. Genital Herpes Patients should be informed that valacyclovir is not a cure for genital herpes.

Because genital herpes is a sexually transmitted disease, patients should avoid contact with lesions or intercourse when lesions and/or symptoms are present to avoid infecting partners. Genital herpes is frequently transmitted in the absence of symptoms through asymptomatic viral shedding. Therefore, patients should be counseled to use safer sex practices in combination with suppressive therapy with valacyclovir.

Sex partners of infected persons should be advised that they might be infected even if they have no symptoms. Type-specific serologic testing of asymptomatic partners of persons with genital herpes can determine whether risk for HSV-2 acquisition exists. Valacyclovir has not been shown to reduce transmission of sexually transmitted infections other than HSV-2.

If medical management of a genital herpes recurrence is indicated, patients should be advised to initiate therapy at the first sign or symptom of an episode. There are no data on the effectiveness of treatment initiated more than 72 hours after the onset of signs and symptoms of a first episode of genital herpes or more than 24 hours after the onset of signs and symptoms of a recurrent episode. There are no data on the safety or effectiveness of chronic suppressive therapy of more than 1 year’s duration in otherwise healthy patients.

There are no data on the safety or effectiveness of chronic suppressive therapy of more than 6 months’ duration in HIV-1−infected patients. Herpes Zoster There are no data on treatment initiated more than 72 hours after onset of the zoster rash. Patients should be advised to initiate treatment as soon as possible after a diagnosis of herpes zoster.

Chickenpox Patients should be advised to initiate treatment at the earliest sign or symptom of chickenpox. Manufactured for: Camber Pharmaceuticals, Inc. Piscataway, NJ 08854 By: Hetero TM Hetero Labs Limited, Unit V, Polepally, Jadcherla, Mahabubnagar-509 301, India.

By: HETERO TM Plot No. 28P1 to 36P1 & 37 to 54, Vemagal Industrial Area, Hobli Vemagal, Kolar, Karnataka - 563102, India. Revised: 11/2025

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗
← 43063-0770-06 · PD-Rx 43063-0773-15 · PD-Rx →
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