Theophylline (Aminophylline, Deriphyllin, Theolong, Theomac) Some heavy smokers may require as much as one and a half to two time the maintenance dose of theophylline. It may take six months to three years to return to normal after smoking is stopped. Propranolol (Inderal Corbeta), Metoprolol (Metolar, Betaloc) |