Theophylline levels are increased in all, except
Ans. is 'b' i.e., Smoking Smoking induces theophylline metabolism and decreases its plasma level.In certain conditions theophylline concentration is increased, so its dose has to be reduced.These conditions are - Age > 60 years CHFPneumonia Liver failureDrugs causing increased concentration of theophyllineErythromycinCiprofloxacinCimetidineOral contraceptivesAllopurinol
Erythromycin
Smoking
Cimetidine
CHF
Asthma