This is NEVER a good idea! It's okay if you no longer wish to take medication (unless someone is ordered by the court to do so.) BUT you MUST, simply MUST notify the prescribing physician and use their advice on HOW to do so safely.
The modern medications, especially psychotropics, are specific for brain chemical involvement, and going "cold turkey" off them can be quite harmful.
You have the right not to take them, but the liability is on your physician who thinks you are taking them.
You won't have to "watch" for withdrawals, they'll be all over you! Call your doctor, and wait until the doctor sees you or calls you back, PLEASE?