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Antibiotics & antivirals

Isoniazid

Isoniazid 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 Antimycobacterial [EPC]

What it's used for

This medication is used for all forms of tuberculosis caused by susceptible organisms, always given alongside other anti-tuberculosis drugs to treat active infections.

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

Typical dosing

Dosing should follow established medical guidelines for tuberculosis prevention and treatment as recommended by a physician.

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 can cause severe and potentially life-threatening skin reactions.

Common side effects

The most frequent side effects affect the liver and nervous system, with nerve damage being the most common.

Covered strengths on the Tab $0 list

Isoniazid 100mg TabletIsoniazid 300mg TabletIsoniazid 50mg/5mL Solution

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

AcyclovirAmoxicillinAmpicillin TrihydrateAzithromycinBacitracinCephalexin

Other antibiotics & antivirals 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.