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Allergy, cough & cold

Promethazine HCl

Promethazine HCl is a covered generic medication on Tab's $0 list. Here's what it's used for, typical dosing, and side effects, sourced from FDA-approved drug labeling.

$0 with active Tab membership Oral

What it's used for

Promethazine hydrochloride is used orally to treat perennial and seasonal allergic rhinitis, as well as vasomotor rhinitis.

Source: U.S. FDA-approved prescribing information (openFDA).

Typical dosing

The average oral adult dose is 25 mg taken before bedtime, with 12.5 mg taken before meals and at bedtime when necessary.

Dosing shown here is the general FDA-labeled range. Your prescribing clinician determines the exact dose, form, and schedule for you — this is not a substitute for medical advice.

Boxed warning / key safety info

This medication should not be used in children under 2 years of age because of the potential for fatal respiratory depression.

Common side effects

Drowsiness is the most common central nervous system side effect, alongside sedation, blurred vision, dizziness, and confusion.

Covered strengths on the Tab $0 list

Promethazine HCl 25 mg Tablet

Covered at $0 with an active Tab membership when filled at a participating pharmacy nationwide or through mail order. A licensed clinician must prescribe the medication.

Related medications

Acetaminophen W/ CodeineCetirizineCetirizine HClDesloratadineDiphenhydramineDiphenhydramine/Zinc

Other allergy, cough & cold medications covered at $0 with an active Tab membership.

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Tab is a membership and prescription-discount program—not insurance, and not a substitute for it. $0 pricing applies to medications on the current covered generic list with active membership, at participating pharmacy locations nationwide or through mail order, and is subject to change. Mail-order home delivery is preferred for recurring prescriptions; activation, availability, and delivery timing apply. This page is for general reference, drawn from FDA-approved drug labeling, and is not medical advice. Only a licensed clinician can determine if a medication is right for you.