Hi, Welcome to Healthcaremagic.com. I had gone through your question I can understand your concern about your drug induced head ache. Because you have the history of some psycatric issue you don t need to stop drug of its own. The the three listed problems above are main side effects of the drug. The tight headedness or headache what you experience start if you rise up once from your bed, start walking or running suddenly, or stand up suddenly. You need to start any type of movement even like. Rising up slowly. For dry mouth or. Metallic taste you can chew sugar free gum and dizziness will. Start vane off after some time. You can also get the drug changed by your doctor too. Hope my answer will help you and you can write to us further if you feel any further assistance is needed.