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| Clinical data | |
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| Trade names | Posicor |
| AHFS/Drugs.com | Micromedex Detailed Consumer Information |
| MedlinePlus | a607007 |
| Routes of administration | By mouth (tablets) |
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| Pharmacokinetic data | |
| Bioavailability | 70% |
| Protein binding | >99% |
| Metabolism | Liver (CYP3A4) |
| Eliminationhalf-life | 17–25 hours |
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| Chemical and physical data | |
| Formula | C29H38FN3O3 |
| Molar mass | 495.639 g·mol−1 |
| 3D model (JSmol) | |
| Melting point | 128 °C (262 °F) (dihydrochloride salt) |
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Mibefradil (trade namePosicor) was apharmaceutical drug used for the treatment ofhypertension and chronicangina pectoris. It is a nonselectivecalcium channel blocker. It was voluntary pulled from the market ten months after FDA approval, citing potential serious health hazards shown in post release studies.[1]
The mechanism of action of mibefradil is characterized by the selective blockade of transient, low-voltage-activated (T-type) calcium channels over long-lasting, high-voltage-activated (L-type) calcium channels,[1] which is probably responsible for many of its unique properties.[citation needed]
On June 8, 1998,Roche announced the voluntary withdrawal of the drug from the market, one year after approval by the FDA, due to the potential for drug interactions, some of them deadly, which may occur when it is taken together with some other medications.[2]
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