Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0017168 (gastroesophageal reflux disease)
 11,783 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Famotidine is a specific, long-acting histamine2-receptor antagonist. It is indicated for the treatment of duodenal ulcer, gastric ulcer, gastroesophageal reflux disease, and Zollinger-Ellison syndrome. Since its introduction for the treatment of acid-related disorders in 1985, an estimated 18.8 million patients worldwide have been treated with famotidine. We present a comprehensive safety profile of oral famotidine, incorporating data from investigational trials, postmarketing studies, and reports of marketed use. The excellent tolerability profile of famotidine observed during investigational trials has remained substantially unchanged during postmarketing experience. Famotidine does not notably bind to cytochrome P-450 or gastric alcohol dehydrogenase and therefore has not been associated with clinically significant drug interactions. It is generally well tolerated in patients with cardiovascular, renal, or hepatic dysfunction or with Zollinger-Ellison syndrome who have tolerated doses up to 800 mg daily.
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PMID:The tolerability and safety profile of famotidine. 885 52

Sildenafil is the first orally administered available treatment for erectile dysfunction. It produces a selective vasodilatation of corpus carvernosum, mediated by the inhibition of phosphodiesterase 5, an enzyme that degrades GMPc. Its therapeutic efficacy has been demonstrated in organic as well as psychogenic or mixed erectile dysfunction. Most of its adverse effects, such as headache, flushing, gastroesophageal reflux and color vision disturbances, are related to the mechanism of action. Its interactions with other medications, can have severe adverse consequences. The concomitant use of sildenafil with drugs that release nitric oxide in their molecule, can produce severe hypotension. In patients with coronary heart disease or cardiac failure, this interaction can cause death. Sildenafil is metabolized in the liver through cytochrome P-450. This enzymatic system can be inhibited by cimetidine, ketoconazole or erythromycin. These drugs can increase plasma concentrations of sildenafil. We must identify the groups of patients that will have a better response to the drug and those in whom the drug will be useless. We must also know more about the security profile of the drug. With time, we will know the real role of sildenafil in the treatment of erectile dysfunction.
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PMID:[Sildenafil (viagra) at the time of warnings]. 1034 69