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vardenafil hydrochloride tablet, film coatedRitonavir (600 mg b.i.d.) co-administered with Levitra 5 mg resulted in a 49-fold increase in vardenafil AUC and a 13-fold increase in vardenafil Cmax. The interaction is a consequence of blocking hepatic metabolism of vardenafil by ritonavir, a HIV protease inhibitor and a highly potent CYP3A4 inhibitor, which also inhibits CYP2C9. Ritonavir significantly prolonged the half-life of vardenafil to 26 hours. Consequently, it is recommended not to exceed a single 2.5 mg Levitra dose in a 72-hour period when used in combination with ritonavir. [See Dosage and Administration (2.4) and Warnings and Precautions (5.2).]. viagra information ?itching or burning during urinationmental depressionPackaging

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How A Little Blue Pill Changed The World viragra Alfuzosin — A single oral dose of tadalafil 20 mg or placebo was administered in a 2-period, crossover design to healthy subjects taking once-daily alfuzosin HCl 10 mg extended-release tablets, an alpha[1]-adrenergic blocker (N=17 completed subjects). Tadalafil or placebo was administered 4 hours after alfuzosin following a minimum of seven days of alfuzosin dosing. ED+BPHCialis for Once Daily Use — For patients taking concomitant potent inhibitors of CYP3A4, such as ketoconazole or ritonavir, the maximum recommended dose is 2.5 mg [see Warnings and Precautions (5.10) and Drug Interactions (7.2)].

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