This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
All are used in the treatment of hot flushes except 
Select and explain. 
A. Tamoxifen, B. Venlafaxine, C. Gabapentin, D. clonidine
A: Tamoxifen
Answer: A: Tamoxifen 
Explanation: A hot flush is the adverse effect of tamoxifen venlafaxine is a serotonin and noradrenaline reuptake inhibitors used for hot flushes. Clonidine attenuates vasomotor symptoms of menopausal syndrome. Gabapentin can be used rarely (Ref.Essentials.of medical pharmacology TD Tripathi 7th edition page no.313)