I took Effexor for almost 2 years and the reason I stopped was the terrible side effects that are inevitable no matter how you taper off the drug. I was on 150 same as you and went down to 75 then I quit cold turkey. I would eat and it wouldn’t digest Id just throw it all up, weird things in my vision like flashing and yea the brain zaps. When you were on your lowest dosing you’re side effects wouldn’t have lasted longer than 2 to 3 weeks than maybe some side effects that don’t really leave you after taking Effexor. Biggest thing to keep in mind is that no matter How you come at this ur going to feel terrible for alittle bit and you’ll get better. After quitting cold on 75mg… everyone’s different but I would say it all completely went away after a month getting better and better as time went on. This drug has possibly damaged my stomach so anyone with weak stomach lining or weak intestinal walls I don’t think this is healthy for anyone. I got severe bronchitis after 1 and a Half months of being off it and I’m paranoid it has something to do with that as well. I’m scared for anyone taking this as it could damage them long term.