Not a medication, but, 100 mg htp with 1000 mg of l-tyrosine. I took this for a while and it worked fairly well. When I thought it was starting to stop working, I took a week off and went back on. Taking either of these alone, for extended periods of time caused severe depression. They must be taken together. Now, I’m only taking Bacopa. It’s seems to work pretty well. You can buy these on amazon.