Reference — Pharmacology
Tuberculosis Medications Reference
The first-line TB regimen is four drugs — RIPE — taken together for months. Each one has a signature toxicity that maps to a teaching point and a monitoring task, and the whole regimen lives or dies on adherence.
Educational use only. Regimens, durations, and monitoring intervals are provider- and public-health-directed; this reference is a study and teaching aid. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
The RIPE Regimen
| Drug | Signature Toxicity | Monitoring | Teaching |
|---|---|---|---|
| Rifampin | Hepatotoxicity; potent CYP450 inducer | LFTs; review all other meds | Orange-red urine/sweat/tears (harmless; stains contacts); use backup contraception — it weakens oral contraceptives |
| Isoniazid (INH) | Hepatotoxicity; peripheral neuropathy | LFTs; neuro symptoms | Take pyridoxine (B6) to prevent neuropathy; avoid alcohol; report jaundice/dark urine/RUQ pain |
| Pyrazinamide | Hepatotoxicity; hyperuricemia (gout) | LFTs; uric acid | Push fluids; report joint pain or gout flare |
| Ethambutol | Optic neuritis (vision/color changes) | Baseline + periodic eye exams | Report any blurred vision or trouble seeing green/red immediately |
The Two Themes That Tie It Together
Hepatotoxicity is the shared risk
Three of the four (rifampin, INH, pyrazinamide) stress the liver, so baseline and periodic LFTs plus an alcohol-avoidance message apply across the regimen. Teach the hepatitis warning signs — nausea, anorexia, jaundice, dark urine, right-upper-quadrant pain — as report-now symptoms.
Adherence prevents resistance
Multidrug therapy exists to stop resistant strains from emerging; stopping early or skipping doses is exactly how MDR-TB is created. Directly observed therapy (DOT) — a worker watches each dose — is standard for active disease for this reason. Latent TB is treated with shorter, often single-drug or two-drug regimens to prevent progression.
NCLEX Pearls
- ✦Rifampin → orange-red secretions (expected) and weakened oral contraceptives (use backup).
- ✦Isoniazid → give B6 (pyridoxine) to prevent peripheral neuropathy; watch the liver and avoid alcohol.
- ✦Ethambutol → optic neuritis; teach the patient to report vision and color-vision changes.
- ✦Finish the full multi-month course — incomplete therapy is the cause of drug-resistant TB; DOT supports it.
Related Resources
Standards & sources
Fact-checked Jun 20, 2026This page is written to align with Institute for Safe Medication Practices (ISMP) · FDA prescribing information · The Joint Commission — National Patient Safety Goals. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →