Prescription medicine
Cycloserine
Cycloserine is a prescription medicine. FDA's NDC Directory lists it from 1 generic labeler.
- Generic listed
Check it at the source: the cycloserine FDA label on DailyMed (effective July 30, 2024, Dr. Reddys Laboratories, Inc.); every cycloserine label on DailyMed.
Highlights of the record
FDA label of July 30, 2024; NDC Directory, Drugs@FDA and Orange Book, October 8, 2026
Used for
From the label: indications and usageCycloserine is indicated in the treatment of active pulmonary and extrapulmonary tuberculosis (including renal disease) when the causative organisms are susceptible to this drug and when treatment with the primary medications (streptomycin, isoniazid, rifampin, and ethambutol) has proved inadequate.
Forms and strengths
- 250 mg
Capsule.
On the market
- Generic approvals
- 1 first June 29, 1964; 1 with a marketed status in Drugs@FDA
- Labelers listed (NDC)
- 1 of which 1 under generic applications, 0 under brand applications, repackagers included
Supply and safety
- Pharmacy cost (NADAC)
- Not in the survey
- Shortage (FDA)
- No current entry
- Recalls by its makers (FDA)
- No recall recorded
- FAERS reports
- 2,275 through July 30, 2026
What is cycloserine used for?
From the label: indications and usageCycloserine is indicated in the treatment of active pulmonary and extrapulmonary tuberculosis (including renal disease) when the causative organisms are susceptible to this drug and when treatment with the primary medications (streptomycin, isoniazid, rifampin, and ethambutol) has proved inadequate. Like all antituberculosis drugs, cycloserine should be administered in conjunction with other effective chemotherapy and not as the sole therapeutic agent. Cycloserine may be effective in the treatment of acute urinary tract infections caused by susceptible strains of gram-positive and gram- negative bacteria. […]
Conditions named in the indications of cycloserine's FDA labels, with every medicine labeled for each:
Source: FDA drug label (Cycloserine), ANDA060593 (Sanaluz), as published by Dr. Reddys Laboratories, Inc., effective July 30, 2024 (SPL set 8e7e2665-7a3d-3f54-9f92-5fe845f02ef9), via openFDA; the full label on DailyMed
Is there a generic for cycloserine?
The FDA approved the first generic cycloserine on June 29, 1964. 1 generic application is approved; 1 of it carries a current (not discontinued) marketing status in Drugs@FDA; that status is not evidence that the generic is on sale.
FDA's NDC Directory lists cycloserine from 1 labeler under a generic (ANDA) application. A listing means the company has registered the product for sale; it does not show that every pharmacy stocks it.
Source: Drugs@FDA, FDA NDC Directory and the Orange Book (openFDA bulk files, October 8, 2026)
What does the cycloserine label say about other medicines?
The cycloserine label names no other medicine on this site. The labels of 2 other medicines name cycloserine. The sentences are the labels' own; a label lists what its studies and reports found, not every interaction.
Other labels that name cycloserine
Source: FDA drug label (Cycloserine), ANDA060593 (Sanaluz), as published by Dr. Reddys Laboratories, Inc., effective July 30, 2024 (SPL set 8e7e2665-7a3d-3f54-9f92-5fe845f02ef9), via openFDA; the full label on DailyMed
What do FAERS reports show for cycloserine?
The FDA Adverse Event Reporting System holds 2,275 reports that list cycloserine among the medicines taken, through July 30, 2026, each a report of something that happened, not proof the medicine caused it; 442 are coded as a death and 792 as a hospital stay. Counts follow how widely a medicine is used and watched, and they are not a measure of how risky it is.
Reports received each year
The most reported reactions
Source: FDA Adverse Event Reporting System (FAERS) via openFDA, reports through July 30, 2026
What else is labeled for the same conditions as cycloserine?
26 other medicines are given the same way (oral) and in the same FDA class as cycloserine or labeled mainly for the same use (bacterial infections), the same class first. Bacterial infections lists all 51 medicines labeled for it, by any route. The first 8 are below. They are listed as records, not as substitutes: whether one can replace another is a prescriber's decision.
| Medicine | Shared indication | Generic labelers (oral) | Pharmacy cost | Shortage |
|---|---|---|---|---|
| Doxycycline | Bacterial infections, Urinary tract infections | 71 labelers | $0.118 per tablet 100 mg tablet | A presentation being discontinued |
| Amoxicillin | Bacterial infections | 38 labelers | $0.0788 per capsule 500 mg capsule | No current entry |
| Amoxicillin and clavulanate | Bacterial infections, Urinary tract infections | 31 labelers | $0.0693 per mL 600-42.9 mg/5 mL sus | No current entry |
| Azithromycin | Bacterial infections | 47 labelers | $0.266 per tablet 250 mg tablet | A presentation being discontinued |
| Cephalexin | Bacterial infections, Urinary tract infections | 36 labelers | $0.120 per capsule 500 mg capsule | No current entry |
| Nitrofurantoin | Bacterial infections, Urinary tract infections | 47 labelers | $0.165 per capsule 50 mg capsule | A presentation being discontinued |
| Metronidazole | Bacterial infections | 40 labelers | $0.102 per tablet 250 mg tablet | In shortage |
| Clindamycin | Bacterial infections | 40 labelers | $0.103 per capsule 150 mg capsule | In shortage |
Source: FDA drug labels (indications), NDC Directory, NADAC of October 7, 2026, FDA shortages (October 8, 2026)
What next?
- Cycloserine side effects
- the label's list beside FAERS reports
- Check an interaction
- what two or more labels say about each other