NDC 51662-1248-1 (51662-1248-01) — PROMETHAZINE HCI 50 mg/mL, 1 mL

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 51662-1248-1

Product NDC 51662-1248

11-digit billing NDC 51662124801

RxCUI 992858

UNII R61ZEH7I1I

Application # ANDA083312

SPL Set ID 744bcc7b-a1b3-1b72-e053-2a91aa0a7c3a

Established class (EPC) Phenothiazine

Chemical class Phenothiazines

DEA schedule Non-controlled

Marketing category ANDA

Marketing status On market

FDA listing status Listed (active directory)

Marketing start 2018-08-26

Route INTRAMUSCULAR, INTRAVENOUS

Dosage form INJECTION

Substance PROMETHAZINE HYDROCHLORIDE

TE code (Orange Book) AP · RLD · RS

Quick answers

RxCUI (RxNorm): 992858

Why two NDCs? The FDA registers this code as 51662-1248-1 — a 5-4-1 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 package segment → 51662-1248-01. 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.

FDA openFDA NDC Directory · synced Oct 1, 2026
FDA label on DailyMed · label index refreshed Oct 1, 2026
RxNorm (NLM RxNav) · catalog refreshed Oct 1, 2026
Medi-Span GPI (licensed)
First Databank (licensed) · refreshed Oct 1, 2026

RxNorm drug class

This medicine belongs to the Phenothiazine class.

Pharmacologic class Phenothiazine

Drug family (ATC) Antihistamines for topical use, Phenothiazine derivatives

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.

RxClass (NLM) · catalog refreshed Oct 1, 2026

Clinical

📗 Our plain-language guide HelloPharmacist

It treats allergy symptoms like allergic rhinitis and hives, motion sickness, and nausea and vomiting around surgery. It is also used for sedation. Which uses apply depends on the...
Very likely. Drowsiness is its most common effect. Don't drive or use machinery until you know how it affects you, and avoid alcohol and other sedating medicines.
Not if the child is under 2. It can cause fatal slowed breathing in that age group. For children 2 and older, it needs real caution and the lowest effective dose, so only use it as...
Use an accurate measuring device, not a kitchen teaspoon, which can lead to overdose. I can give you an oral syringe or dosing cup and show you how to measure.

📖 Read our full Promethazine guide →

Patient education

📘 MedlinePlus patient leaflet ↗

Supplement & herbal interactions

🌿 Drug–supplement interaction checker →

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.

MedlinePlus (NLM) · refreshed Oct 1, 2026
FDA label on DailyMed · label index refreshed Oct 1, 2026

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 system	Per each	Per 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 · quarterly	No Part D plan price is available for this NDC in our data.
Medicare Part B allowsASP · J2550	$3.639 / J2550 unit	—

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.

CMS NADAC weekly file
CMS ASP pricing files · refreshed Sep 20, 2026
CMS Medicaid State Drug Utilization Data · refreshed Oct 2, 2026
CMS Part D plan pricing files · refreshed Sep 24, 2026
VA National Acquisition Center price file

Billing & reimbursement

FDA NDC (as labeled)51662-1248-1

11-digit billing NDC51662-1248-01

Format5-4-1 as registered → padded to 5-4-2 for billing (zero added to the package segment)

HCPCS J-codeJ2550

DescriptorInjection, promethazine hcl, up to 50 mg

Billing units / pkg1 units

Medicare Part B spend (2026 (Q1))$12,185 · 2,981 claims · $4.09 per claim (all NDCs under J2550)

Crosswalk sourceCMS ASP NDC-HCPCS Crosswalk

Where does this data come from?

The HCPCS J-code crosswalk comes from the CMS ASP NDC-HCPCS crosswalk and the DMEPDAC (DME MAC) NDC-HCPCS crosswalk — free public CMS data. Billing units are derived from the code’s descriptor and the package amount.

CMS ASP NDC-HCPCS crosswalk · refreshed Sep 22, 2026
DMEPDAC NDC-HCPCS crosswalk
openFDA NSDE billing units · refreshed Sep 7, 2026

Packaging — all sizes for this product

Package NDC	Description	Marketing start	Marketing end	Status
51662-1248-01 You're viewing this Main listing	1 mL in 1 AMPULE	2018-08-26	—	Active
51662-1248-03 51662-1248-3	25 POUCH in 1 CASE / 1 AMPULE in 1 POUCH / 1 mL in 1 AMPULE	2018-08-26	—	Active

Pack size FAQ

What quantity is in this package?

This package contains 1 mL — 1 ml in 1 ampule.

How does this package differ from NDC 51662-1248-03?

Both are PROMETHAZINE HCI 50 mg/mL Injection — the drug itself is identical. This page's package is the 1 mL one, while NDC 51662-1248-03 is the 25 pouches package.

What NDC number is used to bill for this package of PROMETHAZINE HCI 50 mg/mL Injection?

Use the 11-digit billing form listed in the identifiers section of this page. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.

Therapeutic equivalents

Product	Labeler	Pack	NADAC/unit	TE	Status	Price vs. this
Promethazine Hydrochloride 50 mg/mL 00641-0949-35	Hikma	25 ampules	$2.339	AP	Discontinued	—
Promethazine Hydrochloride 50 mg/mL 00641-1496-35	Hikma	25 ampules	$2.339	AP	Discontinued	—
Promethazine Hydrochloride 50 mg/mL 39822-5550-06	XGen	25 ampules	$2.339	AP	Availability likely	—
Promethazine Hydrochloride 50 mg/mL 00404-9942-01	Henry	1 ampule	—	AP	FDA listed	—
Promethazine Hydrochloride 50 mg/mL 00641-0929-25	Hikma	25 vials	—	AP	FDA listed	—
Promethazine Hydrochloride 50 mg/mL 00641-0956-25	Hikma	25 vials	—	AP	FDA listed	—
Phenergan 50 mg/mL 00641-6083-25	Hikma	25 ampules	—	AP	Discontinued	—
Phenergan 50 mg/mL 00641-6085-25	Hikma	25 vials	—	AP	FDA listed	—
Promethazine Hydrochloride 50 mg/mL 50090-0879-00	A-S	25 vials	—	AP	FDA listed	—
Promethazine Hci 50 mg/mLthis 51662-1248-01	HF	1 ml	—	AP	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.

FDA openFDA NDC Directory · synced Oct 1, 2026
FDA Orange Book · refreshed Sep 3, 2026
CMS NADAC weekly file

Availability & generic status

🏛️

2018

On the market since

Aug 2018

📍

2026

Currently FDA-listed

8 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.

FDA Orange Book · refreshed Sep 3, 2026

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.

Loading inactive ingredients from the official FDA label in the background. No external source is being called by this page request.

Where does this data come from?

Source: official FDA Structured Product Labeling (SPL) via DailyMed and the openFDA label index. Structured IACT rows and label-wide narrative are kept separate; availability and product-level specificity depend on the submitted label.

FDA label on DailyMed · label index refreshed Oct 1, 2026
FDA openFDA NDC Directory · synced Oct 1, 2026

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.

Manufacturer & labeler

LabelerHF Acquisition Co. LLC, DBA HealthFirst

Application holderHIKMA PHARMACEUTICALS USA INC

FDA applicationANDA083312 (ANDA)

Labeler code51662

First marketedAug 2018

Product typeHuman Prescription Drug

Portfolio17 products on file

🔎 All NDCs from HF Acquisition Co. LLC, DBA HealthFirst

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.

FDA openFDA NDC Directory · synced Oct 1, 2026
Drugs@FDA

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.

🚨 Boxed Warning 🎯 Indications and Usage ⏱️ Dosage and Administration ⛔ Contraindications ⚠️ Warnings 🤒 Adverse Reactions 🆘 Overdosage 🧬 Clinical Pharmacology 📦 How Supplied / Storage and Handling 📋 Description

🚨 Boxed Warning 4 words ▾

Boxed Warning Boxed Warming

🎯 Indications and Usage 141 words ▾

Indications And Usage Promethazine hydrochloride injection is indicated for the following conditions: Amelioration of allergic reactions to blood or plasma. In anaphylaxis as an adjunct to epinephrine and other standard measures after the acute symptoms have been controlled. For other uncomplicated allergic conditions of the immediate type when oral therapy is impossible or contraindicated.

For sedation and relief of apprehension and to produce light sleep from which the patient can be easily aroused. Active treatment of motion sickness. Prevention and control of nausea and vomiting associated with certain types of anesthesia and surgery.

As an adjunct to analgesics for the control of postoperative pain. Preoperative, postoperative, and obstetric (during labor) sedation. Intravenously in special surgical situations, such as repeated bronchoscopy, ophthalmic surgery, and poor-risk patients, with reduced amounts of meperidine or other narcotic analgesic as an adjunct to anesthesia and analgesia.

⏱️ Dosage and Administration ~3 min read ▾

Dosage and Administration Important Notes on Administration Promethazine hydrochloride injection can cause severe chemical irritation and damage to tissues regardless of the route of administration. Irritation and damage can result from perivascular extravasation, unintentional intra-arterial injection, and intraneuronal or perineuronal infiltration (see Warnings - Severe Tissue Injury, Including Gangrene). The preferred parenteral route of administration for promethazine hydrochloride injection is by deep intramuscular injection.

Under no circumstances should promethazine hydrochloride injection be given by intra-arterial injection due to the likelihood of severe arteriospasm and the possibility of resultant gangrene (see Warnings - Severe Tissue Injury, Including Gangrene). Subcutaneous injection is contraindicated as it may result in tissue necrosis. When administered intravenously, promethazine hydrochloride injection should be given in a concentration no greater than 25 mg per mL and at a rate not to exceed 25 mg per minute.

It is preferable to inject through the tubing of an intravenous infusion set that is known to be functioning satisfactorily. In the event that a patient complains of pain during intravenous injection of promethazine hydrochloride injection, the injection should be stopped immediately to evaluate for possible arterial injection or perivascular extravasation. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

Do not use promethazine hydrochloride injection if solution has developed color or contains precipitate. To avoid the possibility of physical and/or chemical incompatibility, consult specialized literature before diluting with any injectable solution or combining with any other medication. Do not use if there is a precipitate or any sign of incompatibility.

Allergic Conditions The average adult dose is 25 mg. This dose may be repeated within two hours if necessary, but continued therapy, if indicated, should be via the oral route as soon as existing circumstances permit. After initiation of treatment, dosage should be adjusted to the smallest amount adequate to relieve symptoms.

The average adult dose for amelioration of allergic reactions to blood or plasma is 25 mg. Sedation In hospitalized adult patients, nighttime sedation may be achieved by a dose of 25 to 50 mg of promethazine hydrochloride injection. Nausea and Vomiting For control of nausea and vomiting, the usual adult dose is 12.5 to 25 mg, not to be repeated more frequently than every four hours.

When used for control of postoperative nausea and vomiting, the dosage of analgesics and barbiturates should be reduced accordingly (see Precautions - Drug Interactions). Antiemetics should not be used in vomiting of unknown etiology in children and adolescents (see Precautions - Pediatric Use). Preoperative and Postoperative Use As an adjunct to preoperative or postoperative medication, 25 to 50 mg of promethazine hydrochloride injection in adults may be combined with appropriately reduced doses of analgesics and atropine-like drugs as desired.

Dosage of concomitant analgesic or hypnotic medication should be reduced accordingly (see Precautions - Drug Interactions). Promethazine hydrochloride is contraindicated for use in pediatric patients less than two years of age. Obstetrics Promethazine hydrochloride injection in doses of 50 mg will provide sedation and relieve apprehension in the early stages of labor.

When labor is definitely established, 25 to 75 mg (average dose, 50 mg) promethazine hydrochloride injection may be given with an appropriately reduced dose of any desired narcotic (see Precautions - Drug Interactions). If necessary, promethazine hydrochloride injection with a reduced dose of analgesic may be repeated once or twice at four-hour intervals in the course of a normal labor. A maximum total dose of 100 mg of promethazine…

⛔ Contraindications 145 words ▾

Contraindications Children Less Than 2 Years of Age Promethazine hydrochloride injection is contraindicated for use in pediatric patients less than two years of age due to the risk of respiratory depression (see Warnings - Respiratory Depression). Comatose State Promethazine hydrochloride injection is contraindicated in comatose states. Intra-Arterial Injection Under no circumstances should promethazine hydrochloride injection be given by intra-arterial injection due to the likelihood of severe arteriospasm and the possibility of resultant gangrene (see Warnings - Severe Tissue Injury, Including Gangrene).

Subcutaneous Injection Promethazine hydrochloride injection should not be given by the subcutaneous route because evidence of chemical irritation has been noted, and necrotic lesions have resulted following subcutaneous injection. The preferred parenteral route of administration is by deep intramuscular injection. Idiosyncratic Reaction or Hypersensitivity Promethazine hydrochloride injection is contraindicated in patients who have demonstrated an idiosyncratic reaction or hypersensitivity to promethazine or other phenothiazines.

⚠️ Warnings ~2 min read ▾

Warnings Respiratory Depression Pediatrics Promethazine hydrochloride injection should not be used in pediatric patients less than 2 years of age because of the potential for fatal respiratory depression. Postmarketing cases of respiratory depression, including fatalities, have been reported with use of promethazine in pediatric patients less than 2 years of age. A wide range of weight-based doses of promethazine hydrochloride injection have resulted in respiratory depression in these patients.

Caution should be exercised when administering promethazine hydrochloride injection to pediatric patients 2 years of age and older. It is recommended that the lowest effective dose of promethazine hydrochloride injection be used in pediatric patients 2 years of age and older. Avoid concomitant administration of other drugs with respiratory depressant effects because of an association with respiratory depression, and sometimes death, in pediatric patients.

Other Because of the risk of potentially fatal respiratory depression, use of promethazine hydrochloride injection in patients with compromised respiratory function or patients at risk for respiratory failure (e.g. COPD, sleep apnea) should be avoided. Severe Tissue Injury, Including Gangrene Promethazine hydrochloride injection can cause severe chemical irritation and damage to tissues regardless of the route of administration.

Irritation and damage can result from perivascular extravasation, unintentional intra-arterial injection, and intraneuronal or perineuronal infiltration. Adverse event reports include burning, pain, erythema, swelling, sensory loss, palsies, paralysis, severe spasm of distal vessels, thrombophlebitis, venous thrombosis, phlebitis, abscesses, tissue necrosis, and gangrene. In some cases, surgical intervention, including fasciotomy, skin graft, and/or amputation have been required.

Because of the risks of intravenous injection, the preferred route of administration of promethazine hydrochloride injection is deep intramuscular injection (see Dosage and Administration ). Subcutaneous injection is contraindicated. Due to the close proximity of arteries and veins in the areas most commonly used for intravenous injection, extreme care should be exercised to avoid perivascular extravasation or unintentional intra-arterial injection as pain, severe chemical irritation, severe spasm of distal vessels, and resultant gangrene requiring amputation are likely under such circumstances.

Aspiration of dark blood does not preclude intra-arterial needle placement because blood is discolored upon contact with promethazine hydrochloride injection. Use of syringes with rigid plungers or of small-bore needles might obscure typical arterial backflow if this is relied upon alone. In the event that a patient complains of pain during intravenous injection of promethazine hydrochloride injection, the injection should be stopped immediately to evaluate for possible arterial injection or perivascular extravasation.

There is no proven successful management of unintentional intra-arterial injection or perivascular extravasation after it occurs. Sympathetic block and heparinization have been employed during the acute management of unintentional intra-arterial injection, because of the results of animal experiments with other known arteriolar irritants. CNS Depression Promethazine hydrochloride injection may impair the mental and/or physical abilities required for the performance of potentially hazardous tasks, such as driving a vehicle or operating machinery.

The impairment may be amplified by concomitant use of other central-nervous-system depressants such as alcohol, sedative/hypnotics (including barbiturates), general anesthetics, narcotics, narcotic analgesics, tricyclic antidepressants, and tranquilizers; therefore such agents should either be eliminated or given in reduced dosage in the presence of promethazine hydrochloride (see Precautions - Information for Patients and Drug Interactio…

🤒 Adverse Reactions ~1 min read ▾

Adverse Reactions Respiratory Depression Promethazine hydrochloride injection is contraindicated in pediatric patients less than 2 years of age, because of the potential for fatal respiratory depression. Promethazine hydrochloride injection should be used with caution in pediatric patients 2 years of age and older (see Warnings - Respiratory Depression). Severe Tissue Injury, Including Gangrene Promethazine hydrochloride injection can cause severe chemical irritation and damage to tissues regardless of the route of administration.

Irritation and damage can result from perivascular extravasation, unintentional intra-arterial injection and intraneuronal or perineuronal infiltration. Adverse reactions include burning, pain, erythema, swelling, sensory loss, palsies, paralysis, severe spasm of distal vessels, thrombophlebitis, venous thrombosis, phlebitis, abscesses, tissue necrosis, and gangrene. In some cases, surgical intervention, including fasciotomy, skin graft, and/or amputation have been required (see Warnings - Severe Tissue Injury, Including Gangrene; and Dosage and Administration ).

Central Nervous System Drowsiness is the most prominent CNS effect of this drug. Sedation, somnolence, blurred vision, dizziness, confusion, disorientation, and extrapyramidal symptoms such as oculogyric crisis, torticollis, and tongue protrusion; lassitude, tinnitus, incoordination, fatigue, euphoria, nervousness, diplopia, insomnia, tremors, convulsive seizures, excitation, catatonic-like states, hysteria. Hallucinations have also been reported.

Cardiovascular Increased or decreased blood pressure, tachycardia, bradycardia, faintness. Dermatologic Dermatitis, photosensitivity, urticaria. Hematologic Leukopenia, thrombocytopenia, thrombocytopenic purpura, agranulocytosis.

Gastrointestinal Dry mouth, nausea, vomiting, jaundice. Respiratory Asthma, nasal stuffiness, respiratory depression (potentially fatal) and apnea (potentially fatal). (See Warnings - Respiratory Depression.) Other Angioneurotic edema.

Neuroleptic Malignant Syndrome (potentially fatal) has also been reported. (See Warnings - Neuroleptic Malignant Syndrome.) Paradoxical Reactions Hyperexcitability and abnormal movements have been reported in patients following a single administration of promethazine hydrochloride injection. Consideration should be given to the discontinuation of promethazine hydrochloride injection and to the use of other drugs if these reactions occur.

Respiratory depression, nightmares, delirium, and agitated behavior have also been reported in some of these patients.

🆘 Overdosage ~1 min read ▾

Overdosage Signs and symptoms of overdosage range from mild depression of the central nervous system and cardiovascular system to profound hypotension, respiratory depression, unconsciousness and sudden death. Other reported reactions include hyperreflexia, hypertonia, ataxia, athetosis, and extensor-plantar reflexes (Babinski reflex). Stimulation may be evident, especially in pediatric patients and geriatric patients.

Convulsions may rarely occur. A paradoxical-type reaction has been reported in pediatric patients receiving single doses of 75 mg to 125 mg orally, characterized by hyperexcitability and nightmares. Atropine-like signs and symptoms-dry mouth; fixed, dilated pupils; flushing; etc., as well as gastrointestinal symptoms, may occur.

Treatment Treatment of overdosage is essentially symptomatic and supportive. Only in cases of extreme overdosage or individual sensitivity do vital signs, including respiration, pulse, blood pressure, temperature, and EKG, need to be monitored. Attention should be given to the reestablishment of adequate respiratory exchange through provision of a patent airway and institution of assisted or controlled ventilation.

Diazepam may be used to control convulsions. Acidosis and electrolyte losses should be corrected. Note that any depressant effects of promethazine hydrochloride injection are not reversed by naloxone.

Avoid analeptics, which may cause convulsions. The treatment of choice for resulting hypotension is administration of intravenous fluids, accompanied by repositioning if indicated. In the event that vasopressors are considered for the management of severe hypotension which does not respond to intravenous fluids and repositioning, the administration of norepinephrine or phenylephrine should be considered.

EPINEPHRINE SHOULD NOT BE USED, since its use in a patient with partial adrenergic blockade may further lower the blood pressure. Extrapyramidal reactions may be treated with anticholinergic antiparkinson agents, diphenhydramine, or barbiturates. Oxygen may also be administered.

Limited experience with dialysis indicates that it is not helpful.

🧬 Clinical Pharmacology 151 words ▾

Clinical Pharmacology Promethazine hydrochloride is a phenothiazine derivative which possesses antihistaminic, sedative, antimotion-sickness, antiemetic, and anticholinergic effects. Promethazine is a competitive H1 receptor antagonist, but does not block the release of histamine. Structural differences from the neuroleptic phenothiazines result in its relative lack (1/10 that of chlorpromazine) of dopamine antagonist properties.

Clinical effects are generally apparent within 5 minutes of an intravenous injection and within 20 minutes of an intramuscular injection. Duration of action is four to six hours, although effects may persist up to 12 hours. Promethazine hydrochloride is metabolized in the liver, with the sulfoxides of promethazine and N-desmethylpromethazine being the predominant metabolites appearing in the urine.

Following intravenous administration in healthy volunteers, the plasma half-life for promethazine has been reported to range from 9 to 16 hours. The mean plasma half-life for promethazine after intramuscular administration in healthy volunteers has been reported to be 9.8 ± 3.4 hours.

📦 How Supplied / Storage and Handling 87 words ▾

How Supplied PROMETHAZINE HCI INJECTION, USP is supplied in the following dosage forms. NDC 51662-1248-1 PROMETHAZINE HCI INJECTION, USP 50mg/mL 1mL AMPULE NDC 51662-1248-2 PROMETHAZINE HCI INJECTION, USP 50mg/mL 1mL AMPULE, 1 AMPULE/POUCH NDC 51662-1248-3 PROMETHAZINE HCI INJECTION, USP 50mg/mL 1mL AMPULE, 1 AMPULE/POUCH, 25 POUCHES/CASE HF Acquisition Co LLC, DBA HealthFirst Mukilteo, WA 98275 Store at 20°-25°C (68°-77°F) [See USP Controlled Room Temperature]. Protect from light.

Keep covered in carton until time of use. Do not use if solution has developed color or contains a precipitate.

📋 Description 100 words ▾

Description Promethazine hydrochloride injection, USP is a sterile, pyrogen-free solution for deep intramuscular or intravenous administration. Promethazine hydrochloride (10H-Phenothiazine-10-ethanamine,N,N,α-trimethyl-, monohydrochloride, (±)-) is a racemic compound and has the following structural formula: Each mL contains promethazine hydrochloride either 25 mg or 50 mg, edetate disodium 0.1 mg, calcium chloride 0.04 mg, sodium metabisulfite 0.25 mg and phenol 5 mg in Water for Injection. pH 4.0 to 5.5; buffered with acetic acid-sodium acetate.

Promethazine hydrochloride injection is a clear, colorless solution. The product is light sensitive. It should be inspected before use and discarded if either color or particulate is observed.

Structure

Glossary — plain-language definitions of medical terms used in this label:

contraindicated: Should not be used in that situation, because the risk is considered too high.

sedative: A substance with a calming effect that can also cause drowsiness.

adverse event: Any unwanted medical problem that happens during treatment, whether or not the medicine actually caused it.

Adverse Reactions: Unwanted or harmful effects that people experienced while taking a medicine, listed on its official label.

agranulocytosis: A severe drop in a certain type of infection-fighting white blood cell, greatly raising the risk of serious infections.

anaphylaxis: A sudden, severe, whole-body allergic reaction that can cause trouble breathing, swelling, and a drop in blood pressure, needing emergency care.

antagonist: A substance that blocks a target in the body so a natural signal or another medicine cannot produce its usual effect.

apnea: A pause or temporary stop in breathing.

ataxia: Loss of muscle coordination that makes walking, balance, and controlled movements clumsy or unsteady.

Boxed Warning: The strongest safety warning the FDA can require, set inside a bold black border because the risk it describes can be very serious.

bradycardia: A slower-than-normal heart rate, usually under 60 beats per minute.

Clinical Pharmacology: The label section explaining how a medicine works in the body and how the body processes it.

CNS depression: A slowing of brain and nervous-system activity that can cause drowsiness, slowed breathing, or reduced alertness.

Contraindications: A list of situations or health conditions in which a medicine should not be used because the chance of harm is too high.

depression: A lasting low mood with loss of interest that affects everyday life.

dermatitis: Inflammation of the skin, causing redness, itching, and sometimes swelling or blisters.

diplopia: Double vision, or seeing two images of a single object.

Dosage and Administration: The label section explaining how much of a medicine to use and how to take or give it.

Drug Interactions: The label section listing other medicines, foods, or substances that can change how a medicine works or raise the chance of side effects.

edema: Swelling caused by extra fluid trapped in the body's tissues.

electrolyte: A mineral in the blood and body fluids, such as sodium, potassium, or calcium, that carries a small electric charge and helps the body work.

erythema: Redness of the skin caused by increased blood flow, often from irritation or inflammation.

euphoria: An intense feeling of happiness or well-being that is stronger than a normal good mood.

extrapyramidal symptoms: Movement problems caused by certain medicines, such as stiffness, tremor, restlessness, or unusually slow movements.

extravasation: The accidental leaking of an injected medicine out of the vein into the surrounding tissue, which can cause pain, swelling, or tissue damage.

flushing: Temporary redness and warmth of the skin, often on the face and neck, from widening of small blood vessels.

Half-life: The time it takes for the amount of medicine in the blood to drop by half.

hyperreflexia: Overactive or exaggerated reflexes, such as an unusually strong knee-jerk response.

hypersensitivity: An overreaction of the body's defense system to a substance, causing symptoms such as rash, swelling, or trouble breathing.

hypotension: Blood pressure that is lower than normal, which can cause dizziness or fainting.

Indications and Usage: The label section stating which medical conditions the FDA has officially approved the medicine to treat, prevent, or manage.

infusion: Slowly delivering fluid or medicine into a vein over a period of time, usually through a drip.

insomnia: Trouble falling asleep, staying asleep, or getting restful sleep.

intramuscular: An injection given deep into a muscle; often written as IM.

intravenous: Given directly into a vein through a needle or thin tube; often written as IV.

jaundice: Yellowing of the skin and the whites of the eyes caused by too much bilirubin in the blood.

leukopenia: A low level of white blood cells, the cells that help the body fight off infections.

NDC: A unique number that identifies a specific medicine, its maker, strength, and package size.

neuroleptic malignant syndrome: A rare but serious reaction to certain medicines causing high fever, severe muscle stiffness, confusion, and an unstable heartbeat.

Overdosage: The label section describing what can happen if too much of a medicine is taken and how it may be treated.

parenteral: Given by injection or drip into the body rather than swallowed by mouth.

photosensitivity: An unusually strong skin reaction, such as burning or rash, after being in sunlight or other ultraviolet light.

purpura: Purple spots or patches on the skin caused by bleeding just under the surface.

receptor: A special docking spot on a cell that a medicine or natural body chemical attaches to in order to trigger an effect.

respiratory depression: Breathing that becomes too slow or too shallow to move enough air, so the body may not get enough oxygen.

respiratory failure: A serious condition in which the lungs cannot get enough oxygen into the blood or remove enough carbon dioxide.

sedation: A calm, sleepy, slowed-down state caused by a medicine that relaxes the brain and body.

somnolence: Feeling very sleepy or drowsy, with trouble staying awake during the day.

subcutaneous: An injection placed into the fatty layer just under the skin; often written as subcut or SC.

tachycardia: A faster-than-normal heart rate, usually over 100 beats per minute.

thrombocytopenia: A low level of platelets, the blood cells that help form clots, which can lead to easier bruising or bleeding.

thrombosis: The forming of a blood clot inside a blood vessel, which can block normal blood flow.

tinnitus: Ringing, buzzing, or other noise in the ears that is not coming from an outside sound.

urticaria: Raised, itchy welts on the skin, commonly called hives.

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

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	— Not published for this NDC No photo available yet for this listing.
Inactive ingredients (structured)	— Not published for this NDC The labeler did not submit a structured excipient list, or no SPL is 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	✓ Available
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 form printed on the packaging and shown on DailyMed is the one the FDA registered. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero and the dashes are dropped. The Identity section at the top of this page lists each form of this code.

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 HF Acquisition Co. LLC, DBA HealthFirst. 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 1 other package presentation of this same product, including 25 pouches (51662-1248-03). 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?

HF Acquisition Co. LLC, DBA HealthFirst 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.

Does this product have a billing J-code?

Yes — this NDC cross-references HCPCS code J2550 for medical-claim billing (typically used when a product is administered in a clinical setting rather than dispensed at a retail pharmacy). See the Billing section on this page.

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.

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PROMETHAZINE HCI 50 mg/mL Injection, 1 mL — NDC 51662-1248-1 (Billing 51662-1248-01)

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

RxNorm drug class

Clinical

Patient education

Supplement & herbal interactions

Pricing

Billing & reimbursement

Packaging — all sizes for this product

Pack size FAQ

Therapeutic equivalents

Availability & generic status

Inactive Ingredients / Excipients

Inactive ingredient FAQ

Manufacturer & labeler

Full prescribing information FDA SPL

About this NDC listing & data coverage

Questions about this listing

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