| Item |
Information |
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Drug Groups
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approved |
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Description
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A calcium channel blocker that is a class IV anti-arrhythmia agent. [PubChem] |
| Indication |
For the treatment of hypertension, angina, and cluster headache prophylaxis. |
| Pharmacology |
Verapamil is an L-type calcium channel blocker that also has antiarrythmic activity. The R-enantiomer is more effective at reducing blood pressure compared to the S-enantiomer. However, the S-enantiomer is 20 times more potent than the R-enantiomer at prolonging the PR interval in treating arrhythmias. |
| Toxicity |
LD50=8 mg/kg (i.v. in mice) |
| Affected Organisms |
| • |
Humans and other mammals |
|
| Absorption |
90% |
| Half Life |
2.8-7.4 hours |
| Protein Binding |
90% |
| Elimination |
Approximately 70% of an administered dose is excreted as metabolites in the urine and 16% or more in the feces within 5 days. About 3% to 4% is excreted in the urine as unchanged drug. |
| References |
| • |
Bellamy WT: P-glycoproteins and multidrug resistance. Annu Rev Pharmacol Toxicol. 1996;36:161-83.
[Pubmed]
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| External Links |
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