Question: what are the essential requirements of qiyas discuss?
Answer: The essential requirement of Qiyas are Asl (original case, on which a ruling has been given), Hukm (ruling on the original), Illah (cause of ruling in the original case) and Far' (new case on which ruling is to be given). In the case of prohibition of wine drinking (Maida: 90) if it is to be extended to narcotic drugs.