My husband is in the exact same position - he has also just been prescribed 3 weeks worth of cyproterone acetate in the same dosage as you - it was the surgeons second choice of drug as the hospital is having stock issues with his first choice bicalutamide. We were not told of any alcohol related issues either ! My husband even suggested he should stop drinking whilst having treatment and the surgeon said to him why would you put yourself under stress when you’re about to go through a very stressful time ?!! He is having the first monthly hormone injection this week. I shall follow this with interest - good luck with all your treatment