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Antibiotics & antivirals

Trimethoprim

Trimethoprim 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 Dihydrofolate Reductase Inhibitor Antibacterial [EPC]

What it's used for

Trimethoprim is used to treat or prevent infections proven or strongly suspected to be caused by susceptible bacteria.

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

Typical dosing

The usual oral adult dosage is 100 mg every 12 hours or 200 mg every 24 hours for 10 days.

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

Serious hypersensitivity reactions and interference with blood cell formation have been reported rarely.

Common side effects

The most frequently encountered adverse effects are rash, itching, and phototoxic skin eruptions.

Covered strengths on the Tab $0 list

Trimethoprim 100mg 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

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.