I was on Prozac, then celexa, then Lexapro. My memory had become terrible. It was acutally kind of scary. I seriously thought I had the start of Alzheimers, but my doctor said it was the drug celexa,...
They last longer than any other type of opiate withdrawals. It is far far worse than even heroin withdrawals. I was on methadone for about two years at 100mg and quit cold turkey when I was arrested...
The half life of methadone is very long so the withdrawal period is prolonged. In many cases it can last for months. The acute phase is usually from 2 - 4 weeks.