FDA.reportPublic FDA data

CLEMASTINE FUMARATE

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
CLEMASTINE FUMARATE
Generic name
CLEMASTINE FUMARATE
Manufacturer
Chartwell RX, LLC
Product type
HUMAN PRESCRIPTION DRUG
SPL set ID
6663f1b0-5353-401f-b9d3-d9f69ad08fbf
SPL ID
ffe63870-181f-e007-e053-6294a90a074e
Version
1
Effective date
2023-07-07
Source export date
2026-09-28
Source partition
5
Source file
https://download.open.fda.gov/drug/label/drug-label-0005-of-0014.json.zip
Source object key
raw/openfda/drug-label/2026-09-28/9839785a692b692224cd5f90f9e3a9514c9923a6f521ab83eed3bedc7c0e1d05/drug-label-0005-of-0014.json.zip
Source manifest SHA-256
cd2e66336a5cd2223fa3995098fdbdb84c6a7ee5c0a4addb236ccb22dd1e6887
Import run
20260929T050834Z
Imported at
2026-09-29 05:31:58
Harmonized routes table
Harmonized routes
ORAL

Warnings cross-check#

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Warnings sections page 1 of 1 · 1 matching rows.

warnings

WARNINGS Antihistamines should be used with considerable caution in patients with: narrow angle glaucoma, stenosing peptic ulcer, pyloroduodenal obstruction, symptomatic prostatic hypertrophy, and bladder neck obstruction. Use with CNS Depressants: Clemastine fumarate has additive effects with alcohol and other CNS depressants (hypnotics, sedatives, tranquilizers, etc.) Use in Activities Requiring Mental Alertness: Patients should be warned about engaging in activities requiring mental alertness such as driving a car or operating appliances, machinery, etc. Use in the Elderly (approximately 60 years or older): Antihistamines are more likely to cause dizziness, sedation, and hypotension in elderly patients.

Adverse reactions cross-check#

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

adverse reactions

ADVERSE REACTIONS The most frequent adverse reactions are underlined: Nervous System: Sedation, sleepiness, dizziness, disturbed coordination , fatigue, confusion, restlessness, excitation, nervousness, tremor, irritability, insomnia, euphoria, paresthesia, blurred vision, diplopia, vertigo, tinnitus, acute labyrinthitis, hysteria, neuritis, convulsions. Gastrointestinal System: Epigastric distress , anorexia, nausea, vomiting, diarrhea, constipation. Respiratory System: Thickening of bronchial secretions , tightness of chest and wheezing, nasal stuffiness. Cardiovascular System: Hypotension, headache, palpitations, tachycardia, extrasystoles. Hematologic System: Hemolytic anemia, thrombocytopenia, agranulocytosis. Genitourinary System: Urinary frequency, difficult urination, urinary retention, early menses. General : Urticaria, drug rash, anaphylactic shock, photosensitivity, excessive perspiration, chills, dryness of mouth, nose and throat.

Reported adverse events (FAERS/openFDA)#

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