Triprolidine
Triprolidine is an antihistamine used in several oral liquid products to temporarily relieve symptoms of hay fever (allergic rhinitis) and other upper respiratory allergies.
🧬 Where this information comes from Click to expand
The clinical label records used on this page are FDA-filed Structured Product Labeling (SPL) retrieved through openFDA. We identified 6 clinical label sets within the page’s selected clinical scope after exact ingredient or ingredient-combination matching and applicable route/form matching. Forms, routes, brands, labelers, strengths, and NDC product-record counts are built separately from matching FDA National Drug Code Directory records. The linked DailyMed document is a representative official source for verification, not the page’s only clinical source. View the linked label on DailyMed →
How we combine label and product data →
Triprolidine is an older, sedating antihistamine that blocks histamine to ease sneezing, runny nose, itchy nose or throat, and itchy, watery eyes from hay fever. It is usually a second choice behind newer non-drowsy antihistamines, has been on the U.S. market since about 2003, and is available generically. Most people tolerate it well, but drowsiness is the effect people notice most, and young children can turn excitable instead. Alcohol, sedatives and tranquilizers deepen that drowsiness, so avoid them and skip driving until you know how it affects you, and do not use it at all if you have emphysema, chronic bronchitis, glaucoma or prostate-related trouble urinating.
Clinical pearls
- Flonase Nighttime tablets contain triprolidine, not the steroid in Flonase nasal spray, so they cause the same drowsiness.
- Use only the dropper packed with the product, and never use that dropper for another medicine.
- Ask a doctor before giving it to children under 6, and dose from that exact product's own label.
- Check with a health professional before using it if you are pregnant or breastfeeding.
Patient information guide — a plain-language walkthrough of Triprolidine, written from its FDA label.
What Triprolidine is used for
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Triprolidine is an antihistamine found in several oral liquid products used to temporarily relieve allergy symptoms. Supported uses across the available products include:
- Runny nose caused by hay fever (allergic rhinitis) or other upper respiratory allergies
- Sneezing caused by hay fever or other upper respiratory allergies
- Itching of the nose or throat caused by hay fever or other upper respiratory allergies
- Itchy, watery eyes caused by hay fever or other upper respiratory allergies
These uses are supported by Childrens PediaClear PD, Histex, HISTEX PD Drops, HISTEX PD Drops New Formulation, HISTEX PDX Drops, and Miclara LQ — all oral liquid formulations.
Triprolidine dosage
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All supported triprolidine products are taken by mouth as an oral liquid. Doses are generally taken every 4 to 6 hours as needed, and you should not exceed the maximum number of doses allowed in a 24-hour period — this varies by product, so always follow the directions on your specific label.
- Childrens PediaClear PD: Always use the enclosed dropper; children under 6 should see a doctor first
- HISTEX PD Drops New Formulation: Always use the enclosed dropper; children under 6 should consult a doctor
- Miclara LQ and Histex: Measured by teaspoon or milliliter; children under 6 should consult a doctor
Do not use the enclosed dropper for any other medication. If you miss a dose, simply take the next one when needed — do not double up.
Dosing details from the FDA-approved label
From the Triprolidine prescribing information (“Dosage and Administration”). Doses are set by your prescriber for your product, condition, kidney function and age — never change a dose on your own.
- Triprolidine Hydrochloride Syrup: Adults & Children 12 years of age or older
- 2.67 mL (2.5 milligrams) every 4 to 6 hours, or as directed by a doctor
- Maximum: not to exceed 10.67 mL (10 milligrams) in 24 hours
- use only the enclosed dropper
- Triprolidine Hydrochloride Syrup: Children 6 to under 12 years of age
- 1.33 mL (1.25 milligrams) every 4 to 6 hours, or as directed by a doctor
- Maximum: not to exceed 5.33 mL (5 milligrams) in 24 hours
- use only the enclosed dropper
- Triprolidine Hydrochloride Syrup: Children under 6 years of age
- Consult a doctor
- HISTEX PD Drops: Adults & Children 12 years of age or older
- 2 mL (2.5 mg) every 4 to 6 hours or as directed by a doctor
- Maximum: not to exceed 8 mL (10 mg) in 24 hours
- use only the enclosed dropper
- HISTEX PD Drops: Children 6 to under 12 years of age
- 1 mL (1.25 mg) every 4 to 6 hours or as directed by a doctor
- Maximum: not to exceed 4 mL (5 mg) in 24 hours
- use only the enclosed dropper
- Miclara LQ: Adults and children 12 years of age and older
- 2 teaspoonfuls (10 mL) every 4 to 6 hours or as directed by a doctor
- Maximum: not to exceed 8 teaspoonfuls (40mL) in 24-hour period
- Miclara LQ: Children 6 to under 12 years of age
- 1 teaspoonful (5 mL) every 4 to 6 hours or as directed by a doctor
- Maximum: not to exceed 4 teaspoonfuls (20mL) in a 24-hour period
- Histex Syrup: Adults and Children 12 years of age and older
- 1 teaspoonful (5 mL) every 4 to 6 hours, or as directed by a doctor
- Maximum: not to exceed 4 teaspoonfuls (20 mL) in 24 hours
- Histex Syrup: Children 6 to under 12 years of age
- ½ teaspoonful (2.5 mL) every 4 to 6 hours, or as directed by a doctor
- Maximum: not to exceed 2 teaspoonfuls (10 mL) in 24 hours
- Childrens PediaClear PD: Children 6 to under 12 years
- 2 mL every 6 hours, or as directed by a doctor
- Maximum: not to exceed 4 doses in 24 hours
- use only with enclosed dropper
Read the label’s full dosing text
Directions do not exceed recommended dosage. use only the enclosed dropper do not use enclosed dropper for any other drug product. AGE DOSE Adults & Children 12 years of age or older: 2.67 mL (2.5 milligrams) every 4 to 6 hours, not to exceed 10.67 mL (10 milligrams) in 24 hours, or as directed by a doctor. Children 6 to under 12 years of age: 1.33 mL (1.25 milligrams) every 4 to 6 hours, not to exceed 5.33 mL (5 milligrams) in 24 hours, or as directed by a doctor. Children under 6 years of age: consult a doctor.
Read the full Dosage and Administration section on DailyMed →
Triprolidine side effects
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Common side effects
- Drowsiness
- Excitability, especially in children
When to get medical help
- Stop use and ask a doctor if new symptoms occur
- Seek emergency help or call Poison Control immediately if an overdose is suspected
Triprolidine is generally well tolerated, but it can cause:
- Drowsiness — the most common effect; use caution driving or using machinery
- Excitability — this can happen especially in children, even though drowsiness is more typical in adults
Stop use and contact a doctor right away if new or unexpected symptoms appear, or call Poison Control immediately if you suspect an overdose.
Triprolidine warnings and precautions
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- Drowsiness: This medication can make you sleepy. Avoid driving, operating heavy machinery, or other activities requiring alertness until you know how it affects you.
- Breathing problems: Do not use if you have emphysema or chronic bronchitis — it may make breathing harder.
- Glaucoma: Do not use if you have glaucoma, as this medication can worsen it.
- Enlarged prostate: Do not use if you have trouble urinating due to an enlarged prostate gland.
- Children: Children may become excitable rather than drowsy. Children under 6 should only use this medication under a doctor's direction.
- Pregnancy and breastfeeding: Ask a health professional before using.
Triprolidine interactions
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A few things can interact with triprolidine and make it less safe or increase side effects:
- Alcohol: Increases drowsiness — avoid alcoholic drinks while taking this medication
- Sedatives and tranquilizers: These also increase drowsiness when combined with triprolidine — ask your doctor before using them together
Not a complete list. The label covers the interactions the manufacturer studied or reported, and our own interaction database does not cover every medicine either. Bring your full medication list, including vitamins and herbal products, to your pharmacist.
Before taking Triprolidine
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- Do not use if you have emphysema or chronic bronchitis
- Do not use if you have glaucoma (a condition causing increased pressure in the eye)
- Do not use if you have an enlarged prostate gland causing trouble urinating
- Tell your doctor if you are taking sedatives or tranquilizers before starting this medication
- Pregnant or breastfeeding? Ask a health professional first
- Children under 6 years old: do not use without first consulting a doctor
Triprolidine overdose
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If too much triprolidine is taken accidentally, seek professional medical help or contact a Poison Control Center right away — do not wait for symptoms to appear. Keep this and all medications out of reach of children.
How to store Triprolidine
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Store at 15°-30° C (59°-86° F). Dispense in a tight, light-resistant container with a child-resistant cap.
Written from the FDA-approved label with AI and reviewed by our pharmacy team. How we use AI →
Triprolidine: pharmacist answers to common questions
Quick, plain-English answers to the questions patients ask most about Triprolidine — the kind of thing our pharmacy team would talk through with you at the counter.
What is triprolidine actually used for?
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Will this make me drowsy?
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Can I give this to my young child?
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Are there conditions where I shouldn't take this at all?
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Can I take this if I'm pregnant or breastfeeding?
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What should I do if I accidentally take too much?
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Is Triprolidine available over the counter?
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When was Triprolidine first available?
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Who makes Triprolidine?
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Answers drafted from the FDA-approved label with AI and reviewed by our pharmacy team. How we use AI →
More about Triprolidine on HelloPharmacist
Triprolidine forms and strengths (how it comes)
Triprolidine is available in 2 forms. Different forms and brands can have different approved uses, doses, schedules, and directions. Follow the instructions for your exact product, and do not switch forms without guidance from your prescriber or pharmacist.
Oral solution
How this form is used
- Childrens PediaClear PD: temporarily relieves runny nose, sneezing, itching of the nose or throat, and itchy, watery eyes due to hay fever or upper respiratory allergies
- Histex: temporarily relieves runny nose, sneezing, itching of the nose or throat, and itchy, watery eyes due to hay fever or upper respiratory allergies
- HISTEX PD Drops New Formulation: temporarily relieves runny nose, sneezing, itching of the nose or throat, and itchy, watery eyes due to hay fever or upper respiratory allergies
- Miclara LQ: temporarily relieves runny nose, sneezing, itching of the nose or throat, and itchy, watery eyes due to hay fever or upper respiratory allergies
- Childrens PediaClear PD: use only the enclosed dropper; do not use it for any other drug product; children under 6 should see a doctor before use
- HISTEX PD Drops New Formulation: use only the enclosed dropper; do not use it for any other drug product; children under 6 should consult a doctor
- Miclara LQ: take every 4 to 6 hours; do not exceed the recommended number of doses in 24 hours; children under 6 should consult a doctor
- Histex: take every 4 to 6 hours; do not exceed the recommended number of doses in 24 hours; children under 6 should consult a doctor
Tablet
Triprolidine on the U.S. market: products, makers and brands
How Triprolidine appears in the FDA’s National Drug Code Directory — including its dosage forms, strengths, brand names, manufacturers, and FDA-listed product records. These are directory records, not sales or prescription volume.
11 companies list 24 Triprolidine product records with the FDA, mostly as oral solution, tablet; the earliest marketing or approval year on record is 1977. Brand names on the directory include Pediaclear Childrens, Flonase Nighttime, Childrens PediaClear PD and 7 more; the rest are generics.
FDA-listed product records by dose form (tablet variants merged) — FDA National Drug Code Directory. Record counts are not sales or prescription volume.
Also listed with the FDA, not a patient dose form: Powder (4) — bulk drug substance sold to compounders/manufacturers and multi-item kits. These aren’t counted in the dose-form total above.
Share of FDA-listed product records by manufacturer — FDA National Drug Code Directory. Record counts are not sales or prescription volume.
How widely Triprolidine is used (Medicaid data)
A general measure of how commonly Triprolidine is prescribed, based on Medicaid — one of the largest public drug programs. The figure below is prescriptions filled in Q1–Q4 2025, summed across every form and brand of the drug.
Think of this as a proxy for how widely Triprolidine is used, drawn from freely available public data. Medicaid is just one program — these numbers don’t include Medicare, other government coverage, or commercial and cash-pay prescriptions, so real-world use is higher than what’s shown here.
How commonly is Triprolidine prescribed? Of the 1,599 medications we measure, Triprolidine ranks #353 by Medicaid prescriptions — more than 78% of them.
Utilization by Triprolidine product
Pick a product to see its own Medicaid numbers. Each chip is one clinical product — a specific strength & dosage form as defined by RxNorm — with brand-name and generic versions combined.
triprolidine hydrochloride 1.25 MG/ML Oral Solution Most dispensed
Summed across the 1 of 3 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1926926
triprolidine hydrochloride 0.938 MG/ML Oral Solution
Summed across the 1 of 5 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1491649
triprolidine hydrochloride 0.625 MG/ML Oral Solution
Summed across the 1 of 5 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1428927
triprolidine hydrochloride 0.5 MG/ML Oral Solution
Summed across the 1 of 1 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1490671
Shares are of the Medicaid prescriptions shown here. Product grouping follows RxNorm (the National Library of Medicine’s drug terminology), so “one product” means one strength & dosage form regardless of manufacturer. Dollar figures are gross Medicaid reimbursement before mandatory rebates — rebates (often large, especially for brand-name drugs) are confidential, so actual net cost to Medicaid is lower than shown.
Source: Medicaid State Drug Utilization Data (CMS), aggregated by generic ingredient — summed across every NDC (all brands, strengths, salt forms and dosage forms) of Triprolidine, and across all states and both fee-for-service and managed-care claims. A general popularity signal; it excludes Medicare, commercial insurance and cash prescriptions, so it is not total U.S. use. Based on the 4 of 14 listed Triprolidine NDCs with Medicaid activity.
Compare Triprolidine products
A representative set of FDA-listed product records for Triprolidine — across manufacturers, strengths, and dosage forms, grouped by form with each product’s manufacturer and how the FDA approved it. The same medicine may be made and packaged by different companies, so a single drug can have many directory entries. (It’s also why a refill can look different — a new shape, color, or box — even though it contains the same medication.)
| Strength | Route | Manufacturer / Labeler | Category ⓘ | Details |
|---|---|---|---|---|
| 💊Oral solution | ||||
| 0.938 mg/mL | Oral | Allegis Pharmaceuticals, LLC | OTC MONOGRAPH FINAL | View NDC → |
| 0.938 mg/mL | Oral | Allegis Pharmaceuticals, LLC | OTC MONOGRAPH DRUG | View NDC → |
| 1.25 mg/mL | Oral | Allegis Pharmaceuticals, LLC × 3 listings | OTC MONOGRAPH DRUG | View NDC → |
| 2.5 mg/5 mL | Oral | Allegis Pharmaceuticals, LLC | OTC MONOGRAPH DRUG | View NDC → |
| 2.5 mg/5 mL | Oral | Allegis Pharmaceuticals, LLC | OTC MONOGRAPH FINAL | View NDC → |
| 1.25 mg/2 mL | Oral | Brandywine Pharmaceuticals, LLC | OTC MONOGRAPH DRUG | View NDC → |
| 1.25 mg/2 mL | Oral | GM Pharmaceuticals, INC | OTC MONOGRAPH DRUG | View NDC → |
| 1.25 mg/2 mL | Oral | GM Pharmaceuticals, INC × 2 listings | OTC MONOGRAPH FINAL | View NDC → |
| 1.25 mg/5 mL | Oral | Key Therapeutics | OTC MONOGRAPH FINAL | View NDC → |
| 0.938 mg/mL | Oral | Monarch PCM, LLC | OTC MONOGRAPH FINAL | View NDC → |
| 0.938 mg/mL | Oral | Rugby Laboratories | OTC MONOGRAPH FINAL | View NDC → |
| 0.938 mg/mL | Oral | Rugby Laboratories | OTC MONOGRAPH DRUG | View NDC → |
| 0.938 mg/mL | Oral | Westminster Pharmaceuticals, LLC × 2 listings | OTC MONOGRAPH DRUG | View NDC → |
| 0.938 mg/mL | Oral | Westminster Pharmaceuticals, LLC | OTC MONOGRAPH FINAL | View NDC → |
| 1.25 mg/mL | Oral | Westminster Pharmaceuticals, LLC | OTC MONOGRAPH DRUG | View NDC → |
| 💊Tablet | ||||
| 2.5 mg | Oral | GlaxoSmithKline Consumer Healthcare Holdings (US) LLC | OTC MONOGRAPH DRUG | View NDC → |
| 💊Bulk drug substance | ||||
| 1 kg/kg | — | Divi's Laboratories Limited × 2 listings | BULK INGREDIENT | View NDC → |
| 1 kg/kg | — | Hikal Limited | BULK INGREDIENT | View NDC → |
| 1 kg/kg | — | Malladi Drugs & Pharmaceuticals Limited | BULK INGREDIENT | View NDC → |
Showing 24 of 24 products — FDA National Drug Code Directory. See every product, package size and price: browse all 24 Triprolidine NDCs →
Triprolidine side effects reported to the FDA (FAERS)
After a medicine reaches the market, patients, doctors and drugmakers can send the FDA reports of problems they think may be linked to it. Here’s what’s been reported for Triprolidine — a signal of what to watch for, not proof the drug caused it.
Source: openFDA, from the FDA Adverse Event Reporting System (FAERS). These are voluntary reports — they don’t prove the drug caused the effect, and counts reflect how often something was reported, not how often it actually happens. Reports also often name the very problem the medicine is taken for — a common reason to file one is that the drug didn’t help — so for a pain reliever you may see “pain” high on the list; that points to why the report was filed, not to the drug causing the symptom. This counts every report that lists Triprolidine in any role, so the total runs higher than the FDA’s official dashboard, which counts only cases where the drug is the suspect. For the authoritative figures, see the FDA FAERS Public Dashboard. Always talk to your pharmacist or doctor.
Triprolidine FDA approval history
How Triprolidine went from FDA review to the pharmacy shelf — the key milestones in its regulatory journey.
Source: Drugs@FDA.
Triprolidine recall history
A recall is when a specific batch of a medicine is pulled from the market — usually a manufacturing issue, not a problem with the drug itself. Class I is most serious, Class III least.
The FDA’s enforcement reports list no Triprolidine recalls since July 2021.
✅No Triprolidine recalls on record since July 2021Source: FDA enforcement (recall) reports, via openFDA; our copy was last updated Sep 24, 2026.
RxNorm Concept Web — From Ingredient to Every Form and Strength
This page starts with one ingredient concept (IN). The branches below show its dose-form concepts (SCDF), then the available clinical drug and strength concepts (SCD). Combination products remain separate concepts with their own pages.
RxCUI 10849 3 dose forms · 7 strengths
-
Dose form (SCDF) Chewable Tablet RxCUI 1939353No current FDA listingClinical drug / strength (SCD) hydrochloride 1.25 MGRxCUI 1939354 -
Dose form (SCDF) Oral Solution RxCUI 376317In current FDA listingsClinical drug / strength (SCD) hydrochloride 0.25 MG/MLRxCUI 1099684hydrochloride 0.5 MG/MLRxCUI 1490671hydrochloride 0.625 MG/MLRxCUI 1428927hydrochloride 0.938 MG/MLRxCUI 1491649hydrochloride 1.25 MG/MLRxCUI 1926926 -
Dose form (SCDF) Oral Tablet RxCUI 374249In current FDA listingsClinical drug / strength (SCD) hydrochloride 2.5 MGRxCUI 1099694
Look up RxCUI 10849 in the RxCUI Atlas →
RxNorm is the U.S. National Library of Medicine’s normalized drug vocabulary. Its concept hierarchy can include forms that are not currently marketed; the status on each branch compares that concept with current FDA listings. RxCUIs identify vocabulary concepts, not individual packages or manufacturers.
Triprolidine supply and shortage status
Whether Triprolidine is in short supply in the U.S. right now, plus any shortage history the FDA has on record. A shortage usually reflects a manufacturing or demand issue — not a safety problem with the drug.
Source: openFDA, from the FDA Drug Shortages database.
Triprolidine brand names
Triprolidine is sold under 10 brand names in the FDA directory — Pediaclear Childrens, Flonase Nighttime, Childrens PediaClear PD, Histex and others. A brand and its generic contain the same active ingredient; the brand name belongs to one company's product.
Who makes Triprolidine: manufacturers and labelers
11 companies list Triprolidine products with the FDA. By number of product records, the largest are Allegis Pharmaceuticals, LLC, Westminster Pharmaceuticals, LLC, GM Pharmaceuticals, INC. Labelers include manufacturers and repackagers; the product in your bottle depends on which one your pharmacy stocks.
Triprolidine drug class (RxNorm)
Triprolidine belongs to the Other antihistamines for systemic use class.
Classified by RxNorm RxClass — the U.S. National Library of Medicine's standardized drug-classification service (Established Pharmacologic Class from the FDA, the ATC drug family from the WHO, and mechanism of action). Reference only, not medical advice.
Sources for this Triprolidine page
Core label, product, RxNorm, safety, and utilization data on this page come from the sources identified below. AI-written, editorial, and licensed sections are labeled separately.
How this page is built
HelloPharmacist combines public FDA and NLM records and does not author the underlying clinical facts. The plain-language sections are written with AI from the FDA-approved label text and reviewed by our pharmacy team before publication. Westminster Pharmaceuticals, LLC is the representative DailyMed label linked for verification and dates. This is general education, not medical advice: always talk to your doctor or pharmacist about your own medicines. How we build and review drug pages →