Amines; Breast Neoplasms/complications; Cyclohexanecarboxylic Acids; Cyclohexanols; Hot Flashes; gamma-Aminobutyric Acid; Amines/administration & dosage; Amines/adverse effects; Anti-Anxiety Agents/administration & dosage; Anti-Anxiety Agents/adverse effects; Constipation/chemically induced; Cyclohexanecarboxylic Acids/administration & dosage; Cyclohexanecarboxylic Acids/adverse effects; Cyclohexanols/administration & dosage; Cyclohexanols/adverse effects; Dizziness/chemically induced; Dose-Response Relationship, Drug; Female; Gabapentin; Hot Flashes/drug therapy; Hot Flashes/etiology; Humans; Off-Label Use; Randomized Controlled Trials as Topic; Selective Serotonin Reuptake Inhibitors/administration & dosage; Selective Serotonin Reuptake Inhibitors/adverse effects; Severity of Illness Index; Treatment Outcome; Venlafaxine Hydrochloride; gamma-Aminobutyric Acid/administration & dosage; gamma-Aminobutyric Acid/adverse effects