The Effects of Smoking on the Postoperative Complications. \/ In this study, effects of smoking on the postoperative coughing, bronchospasm, sore throat and headache were investigated in 160 adult patients. 80 patients aged 18-75 (mean 48+18) were in the Nonsmoker group (Control) and 80 patients aged 22-72 (mean 39±13) were in the Smoker group. The two groups were si-milar in respect to age, ASA physical staus (I-II), duration of anaesthesia, use of opioid and anesthetic drugs and conditions of recovery. All patients received atropine (0.01 mg/kg) + pethidine (1 mg/kg) for premedication, thiopental (6-8 mg/kg) + vecuronium (0.1 mg/kg) for induction and 02-N20-isoflurane (33-66-1%) for maintenance of anesthesia. Coughing and bronchospasm were evalua¬ted in one hour at recovery period, the patients were questioned for sore throat and headache after 24 hours. Data were compaired between the two groups. In the Non-smoker groups incidances of coughing were found 1.3%, 37.5%, bronchospasm 1.3%, 21.3% respectively. Differences between the two groups were highly signi¬ficant (p0.05) bulundu. Sonuçta, sigara içiminin postoperatif derlenme sırasında önemli derecede öksürük ve bronkospazma, daha sonraki dönemde ise boğaz ağrısına yol açtığı, bu nedenle opera-syona gidecek hastalarda operasyon karan alındığı andan itibaren terkedilmesi gerek¬tiği kanısına varıldı.