Cimetidine Hydrochloride
Generic Name: cimetidine hydrochloride
Brand Names:
Cimetidine Hydrochloride
DESCRIPTION Cimetidine is a histamine H 2 -receptor antagonist. Chemically it is N"-cyano-N-methyl-N'-[2-[[(5-methyl-1Himidazol-4-yl)methyl]thio]-ethyl],guanidine. The molecular formula for Cimetidine Hydrochloride, USP is C 10 H 16 N 6 S•HCl and the molecular weight is 288.80 the structural formula of Cimetidine Hydrochloride is: Cimetidine contains an imidazole ring, and is chemically related to histamine. Cimetidine has a bitter taste and characteristic odor.
Overview
DESCRIPTION Cimetidine is a histamine H 2 -receptor antagonist. Chemically it is N"-cyano-N-methyl-N'-[2-[[(5-methyl-1Himidazol-4-yl)methyl]thio]-ethyl],guanidine. The molecular formula for Cimetidine Hydrochloride, USP is C 10 H 16 N 6 S•HCl and the molecular weight is 288.80 the structural formula of Cimetidine Hydrochloride is: Cimetidine contains an imidazole ring, and is chemically related to histamine. Cimetidine has a bitter taste and characteristic odor.
Uses
INDICATIONS AND USAGE Cimetidine Hydrochloride Oral Solution is indicated in: (1) Short-term treatment of active duodenal ulcer. Most patients heal within 4 weeks and there is rarely reason to use cimetidine at full dosage for longer than 6 to 8 weeks (see Dosage and Administration-Duodenal Ulcer ). Concomitant antacids should be given as needed for relief of pain. However, simultaneous administration of oral cimetidine and antacids is not recommended, since antacids have been reported to interfere with the absorption of oral cimetidine. (2) Maintenance therapy for duodenal ulcer patients at reduced dosage after healing of active ulcer. Patients have been maintained on continued treatment with cimetidine 400 mg h.s. for periods of up to 5 years.
Dosage
DOSAGE AND ADMINISTRATION Duodenal Ulcer Active Duodenal Ulcer: Clinical studies have indicated that suppression of nocturnal acid is the most important factor in duodenal ulcer healing (see Clinical Pharmacology-Antisecretory Activity-Acid Secretion ). This is supported by recent clinical trials (see Clinical Pharmacology-Clinical Trials Duodenal Ulcer-Active Duodenal Ulcer ). Therefore, there is no apparent rationale, except for familiarity with use, for treating with anything other than a once-daily at bedtime dosage regimen (h.s.). In a U.S. oral dose-ranging study of 400 mg h.s., 800 mg h.s. and 1600 mg h.s., a continuous dose response relationship for ulcer healing was demonstrated. However, 800 mg h.s.
Side Effects
ADVERSE REACTIONS To report SUSPECTED ADVERSE REACTIONS, contact Chartwell RX, LLC. at 1-845-232-1683 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . Adverse effects reported in patients taking cimetidine are described below by body system. Incidence figures of 1 in 100 and greater are generally derived from controlled clinical studies. Gastrointestinal Diarrhea (usually mild) has been reported in approximately 1 in 100 patients. CNS Headaches ranging from mild to severe have been reported in 3.5% of 924 patients taking 1600 mg/day, 2.1% of 2,225 patients taking 800 mg/day and 2.3% of 1,897 patients taking placebo. Dizziness and somnolence (usually mild) have been reported in approximately 1 in 100 patients on either 1600 mg/day or 800 mg/day.
Warnings
CONTRAINDICATIONS Cimetidine is contraindicated for patients known to have hypersensitivity to the product.
Storage
HOW SUPPLIED Cimetidine Hydrochloride Oral Solution is available as a clear yellow, orange-flavored solution as follows: 300 mg/5 mL 8 fl oz (237 mL) bottle NDC 62135-809-37 5 mL Unit Dose Cups NDC 62135-809-05 20 Unit Dose Cups of 5 mL each NDC 62135-809-24 Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature]. Dispense in a tight, light-resistant container.
Frequently Asked Questions
What is Cimetidine Hydrochloride used for?▼
INDICATIONS AND USAGE Cimetidine Hydrochloride Oral Solution is indicated in: (1) Short-term treatment of active duodenal ulcer. Most patients heal within 4 weeks and there is rarely reason to use cimetidine at full dosage for longer than 6 to 8 weeks (see Dosage and Administration-Duodenal Ulcer ). Concomitant antacids should be given as needed for relief of pain. However, simultaneous administration of oral cimetidine and antacids is not recommended, since antacids have been reported to interfere with the absorption of oral cimetidine. (2) Maintenance therapy for duodenal ulcer patients at reduced dosage after healing of active ulcer. Patients have been maintained on continued treatment with cimetidine 400 mg h.s. for periods of up to 5 years.
What are the side effects of Cimetidine Hydrochloride?▼
ADVERSE REACTIONS To report SUSPECTED ADVERSE REACTIONS, contact Chartwell RX, LLC. at 1-845-232-1683 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . Adverse effects reported in patients taking cimetidine are described below by body system. Incidence figures of 1 in 100 and greater are generally derived from controlled clinical studies. Gastrointestinal Diarrhea (usually mild) has been reported in approximately 1 in 100 patients. CNS Headaches ranging from mild to severe have been reported in 3.5% of 924 patients taking 1600 mg/day, 2.1% of 2,225 patients taking 800 mg/day and 2.3% of 1,897 patients taking placebo. Dizziness and somnolence (usually mild) have been reported in approximately 1 in 100 patients on either 1600 mg/day or 800 mg/day.
What are the important warnings for Cimetidine Hydrochloride?▼
CONTRAINDICATIONS Cimetidine is contraindicated for patients known to have hypersensitivity to the product.
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Medical Disclaimer
This drug information is for educational purposes only and should not replace professional medical advice. Drug information is sourced from the FDA National Drug Code Directory and Structured Product Labeling. Always consult with a healthcare provider before starting, stopping, or changing any medication.