Q: Can a person in Itikaf smoke cigarettes?
A: It is not permissible to smoke anywhere in the musjid. If one goes out of musjid to smoke, the I’tikaaf will break, whether he is addicted to cigarettes or not.
Any extra time spent smoking in toilet will also break I’tikaaf. That is, if one has finished answering the call of nature and is just sitting in toilet to finish his cigarette, the I’tikaaf will break.
A smoker who cannot resist smoking can do it within the time it takes him to finish passing urine and stool. He’s not allowed to linger on in the toilet just to finish smoking.
And Allah knows best
Mufti Siraj Desai