Which drug is obtained from opium?

Which of the following opium alkaloids is used for the relaxation of smooth muscles?

The use of nicotine causes:

Which of the following side effects are observed due to the use of anabolic steroids in males?

$A$ male showing aggressiveness,mood swings,depression,reduction of size of the testicles,decreased sperm production,breast enlargement,and premature baldness. Possibly he is taking:

Which substance is responsible for causing liver cirrhosis?