FDA.reportPublic FDA data

phenoxybenzamine hydrochloride

openFDA label record#

This page contains supplementary openFDA label data. For the canonical label presentation, use the corresponding DailyMed Structured Product Label.

Verified complete openFDA source JSON (canonical bytes are SHA-256 checked before publication)

Brand name
phenoxybenzamine hydrochloride
Generic name
PHENOXYBENZAMINE HYDROCHLORIDE
Manufacturer
Rising Pharma Holdings, Inc.
Product type
HUMAN PRESCRIPTION DRUG
SPL set ID
1d2108fa-4352-4f3f-9314-732ed8b6394c
SPL ID
404d834f-4d6c-450f-b9cf-a83c357d0d12
Version
1
Effective date
2026-06-18
Source export date
2026-09-28
Source partition
14
Source file
https://download.open.fda.gov/drug/label/drug-label-0014-of-0014.json.zip
Source object key
raw/openfda/drug-label/2026-09-28/db99fd80353afecef4949b48edcaa018be72b966b2360184251eb14df43743f9/drug-label-0014-of-0014.json.zip
Source manifest SHA-256
cd2e66336a5cd2223fa3995098fdbdb84c6a7ee5c0a4addb236ccb22dd1e6887
Import run
20260929T050834Z
Imported at
2026-09-29 06:41:37
Harmonized routes table
Harmonized routes
ORAL

Warnings cross-check#

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Warnings sections page 1 of 1 · 1 matching rows.

warnings

WARNING Phenoxybenzamine hydrochloride-induced alpha -adrenergic blockade leaves beta -adrenergic receptors unopposed. Compounds that stimulate both types of receptors may, therefore, produce an exaggerated hypotensive response and tachycardia.

Adverse reactions cross-check#

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Adverse reactions sections page 1 of 1 · 1 matching rows.

adverse reactions

ADVERSE REACTIONS The following adverse reactions have been observed, but there are insufficient data to support an estimate of their frequency. Autonomic Nervous System*: Postural hypotension, tachycardia, inhibition of ejaculation, nasal congestion, miosis. *These so-called "side effects" are actually evidence of adrenergic blockade and vary according to the degree of blockade. Miscellaneous: Gastrointestinal irritation, drowsiness, fatigue. To report SUSPECTED ADVERSE REACTIONS, contact Rising Pharma Holdings, Inc. at 1-844-874-7464 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch

Reported adverse events (FAERS/openFDA)#

Adverse event summaries are temporarily unavailable. Other product information remains available.