What development phase is Metrazone in?

Metrazone is FDA-approved (marketed).

What is the generic name of Metrazone?

FEPRAZONE is the generic (nonproprietary) name of Metrazone.

Last reviewed 2026-04-20 · How we verify

Metrazone (FEPRAZONE)

FDA-approved withdrawn Small molecule Quality 6/100

At a glance

Generic name	FEPRAZONE
Drug class	feprazone
Modality	Small molecule
Therapeutic area	Pain
Phase	FDA-approved

Approved indications

No approved indications tracked.

Common side effects

No common side effects on file.

Key clinical trials

Mental Practice Combined With Physical Practice to Improve the Gait Performance of People With Parkinson's Disease (NA)
Protocol: Mental Practice Combined With Physical Practice of Gait in Parkinson's Disease. (NA)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Source	Used for
ClinicalTrials.gov	Trial enrolment, design, endpoints, results

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

Metrazone CI brief — competitive landscape report
Metrazone updates RSS · CI watch RSS