I've read of people taking antidepressants, and apparently the first month or so is the most critical because dosages and/or combinations need to be adjusted so frequently.
If I recall, Merrill has just recently began taking antidepressants.
The baroque and bizarre nature of his suicide - shotgun, boat anchor, in the middle of the Bay - suggests that his thinking was askew, to say the least.
I realize there is no way to have all of the answers in suicide cases, but I'd certainly want as much info as I could get on the drug and possible interactions with others that he was taking.