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Updated: Jul 20, 2026

Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases
Published on: October 10, 2020
Cimetidine is safe for short-term use, up to 8 weeks, based on extensive patient data. While minor creatinine changes are common, they resolve post-treatment, and gynecomastia is rare with long-term use.
Area of Science:
- Pharmacology and Therapeutics
- Gastroenterology
Background:
- Cimetidine is a widely used medication for acid-related gastrointestinal disorders.
- Understanding the safety profile of cimetidine is crucial for clinical practice.
Purpose of the Study:
- To evaluate the safety and tolerability of cimetidine based on comprehensive data.
- To define the safety parameters for short-term and long-term cimetidine administration.
Main Methods:
- A systematic review of published literature was conducted.
- Manufacturer's internal data and United States Food and Drug Administration (FDA) submissions were analyzed.
- Clinical data from over 3000 patients were assessed.
Main Results:
- Cimetidine demonstrated safety for short-term use (up to 8 weeks) in over 3000 patients.
- Clinically insignificant elevations in serum creatinine were observed in a high percentage of patients, resolving after therapy cessation.
- Gynecomastia was reported in a subset of patients undergoing long-term therapy.
Conclusions:
- Cimetidine is considered safe for short-term gastrointestinal treatments.
- Monitoring for serum creatinine elevations and potential gynecomastia is advised for long-term cimetidine use.
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