Trichlormethiazide: uses, dosing, side effects & brands
Trichlormethiazide is a medicine sold in the U.S. under 2 brand and generic names. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Available as
- Tablet
- Sold as
- 2 products — Metahydrin and Trichlormethiazide
- Prescription?
- Prescription only
- Generic available?
- Yes
Every trichlormethiazide product we track (2)
Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.
| # | Drug | Rating | Type | Form | Generic? | Pharmacy pays | |
|---|---|---|---|---|---|---|---|
| 1 | 70/100 | Prescription | Tablet | No data | — | View → | |
| 2 | 70/100 | Prescription | Tablet | No data | — | View → |
Combination products containing trichlormethiazide
A combination is a different drug — different dosing, different warnings. It is listed here so you can find it, not so you can substitute it.
Trichlormethiazide and breastfeeding
From LactMed, the US National Library of Medicine’s Drugs and Lactation Database — quoted, not rewritten.
Full LactMed record for trichlormethiazide: levels in milk, effects in breastfed infants, and the drugs it would consider insteadNo information is available on the amount of trichlormethiazide in breastmilk. Intense diuresis with large doses may decrease breastmilk production. Other diuretics in low doses are preferred over trichlormethiazide.
National Institute of Child Health and Human Development, record revised August 15, 2024. LactMed states its information is not a substitute for professional judgement.
What people report to the FDA about trichlormethiazide
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 1,886 reports naming trichlormethiazide, and the FDA flagged 97% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- pneumonia181 reports
- dyspnoea160 reports
- cardiac failure132 reports
- renal impairment132 reports
- cough127 reports
- obstructive airways disorder111 reports
- pulmonary mass103 reports
- respiratory tract infection103 reports
Read these as a signal, not a rate. A report does not mean trichlormethiazide caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.
Source: openFDA drug/event (FAERS), retrieved July 26, 2026.
Related calculators
Frequently asked questions
Can you take trichlormethiazide with other medicines?
It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run trichlormethiazide against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.
What brand names is trichlormethiazide sold under?
We track 2 trichlormethiazide-containing products in the U.S.: Metahydrin and Trichlormethiazide. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.
What forms does trichlormethiazide come in?
Across the brands we track, trichlormethiazide is currently marketed as tablet, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.
Is there a generic trichlormethiazide?
Yes. Our catalog lists 1 generic trichlormethiazide product alongside the brand versions. A generic has the same active ingredient and must meet the FDA's bioequivalence standard; it usually costs less. Ask your pharmacist which one your plan covers.
Cite this page
- APA
- pharmaranks. (2026, July 24). Trichlormethiazide: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/trichlormethiazide
- MLA
- “Trichlormethiazide: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/trichlormethiazide.
We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.
Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.
Read the full FDA label for trichlormethiazide on DailyMed (NIH) ↗.