... IV or 12 0- 36 0 mg PO ev-ery day in div-ided doses Hypotension, heart block, heart failure Verapamil (Calan, Isoptin) 0.07 5-0 .15 mg per kg IV over 2 minutes 3- 5 minutes 24 0 -3 60 mg PO ... Class Ib -Lidocaine 5 0-1 00 mg (1 mg/kg) IV, then 2-4 mg/min IV. -Mexiletine (Mexitil) 10 0-2 00 mg PO q8h, max 1200 mg/d. -Tocainide (Tonocard) loading 40 0-6 00 mg PO, then 40 0-6 00 mg PO q 8-1 2h; ... po q 8- 12 hrs GI, cinchonism VT/VF/ Torsade de Pointes Procain-amide QRS wid-ens, QT lengthens Load: IV 1 3- 1 7 mg/kg over 3 0- 60 min Maintenance: IV 2-4 mg/min or Procan SR 75 0- 1500...