Rifabutin (150 mg every other day)/ Elvitegravir (150 mg once daily)/ Cobicistat (150 mg once daily) Coadministration of rifabutin, a potent CYP3A inducer, may significantly decrease cobicistat and elvitegravir plasma concentrations, which may result in loss of therapeutic effect and development of resistanceNov 16, · RYTHMOL tablets are supplied as white, biconvex, scored, round, filmcoated tablets containing either 150 mg or 225 mg of propafenone hydrochloride and embossed (on the same side) with GS and TF5 for the 150 mg tablet, and GS and F1X for the 225 mg tablet, in the following package sizes 150 mg bottles of 100 NDCJan 05, 21 · Usual Adult Dose for Ventricular Tachycardia Initial dose 100 mg orally every 12 hours Maintenance dose May be increased in increments of 50 mg bid every 4 days until efficacy is achieved Most patients with SUSTAINED VT do not require more than 150 mg every 12 hours (300 mg/day), and the maximum dose recommended is 400 mg/day Af 150 Tablet Dt View Use