FDA label fdce371e-19a7-43df-8c4f-6cb9ebb723cb

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)

SPL set ID: 48a047c0-f409-420b-990a-2cab953a96cd
SPL ID: fdce371e-19a7-43df-8c4f-6cb9ebb723cb
Version: 3
Effective date: 2026-07-09
Source export date: 2026-10-12
Source partition: 8
Source file: https://download.open.fda.gov/drug/label/drug-label-0008-of-0014.json.zip
Source object key: raw/openfda/drug-label/2026-10-12/fa098e7c5cff0b1ab653ce934059d1f4b90b860bafc0383a1f66223ce1037518/drug-label-0008-of-0014.json.zip
Source manifest SHA-256: 7e6b178df8f32cac9a78e0f5d09c588344509b04fe41effb1dde9102e2a45be6
Import run: 20261013T011858Z
Imported at: 2026-10-13 02:15:53

Harmonized identifier links#

Every typed identifier imported from the complete openFDA harmonization object is paginated here; values are not reduced to a first match.

Harmonized identifiers page 1 of 1 · 2 matching rows.

Type, Scope, Identifier table
Type	Scope	Identifier	Source field
spl id		fdce371e-19a7-43df-8c4f-6cb9ebb723cb	id
spl set id		48a047c0-f409-420b-990a-2cab953a96cd	set_id

Warnings cross-check#

openFDA text is shown for search and cross-checking; DailyMed SPL is canonical.

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#

openFDA text is shown for search and cross-checking; DailyMed SPL is canonical.

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 Northstar Rx LLC at 1-800-206-7821 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.