Invalidation Of Prayers For 40 Days Due To Cigarettes
Nope, that not true as cigarettes donot intoxicate
If there is convincing evidence of cigarettes being intoxicant, then the priniciple will be extended to cigarettes too. However, there is no evidence for cigarettes. Addiction, enjoyment is not the basis of calling any food item haram. Please see for details Discussion 1641
Yes , and small quantities of that thing are also prohibited in Islam on grounds of Sadd-e-Zariya. For example, if 500 ml of Alcohol makes you intoxicated then 1 ml of alcohol is also prohibited.
It does not diminish our mental and physical control so it is not an intoxicant.
Now you know the principle and can apply this to other things which create doubt for you. I do not know about “bidi” therefore I cannot comment on that.