Unless you are a bit of hefty fellow or a large person (and I don't mean fat here, just a meaty dude), and your shit isn't all cut, 200mg seems like it ought to be enough to have you ROLLING--FUCKING--FACE, MAN!
Just one week after such an experience I'd really not advise this.
2C-B & MDMA (sometimes with a small amount of acid and/or Ketamine (esp at the tail end)) is one of my favorite combinations of psychedelics, especially for settings such as festivals, psyparties, or other outdoor shindigs, especially if there are going to possibly be large amounts of other people.I like to take the 2C-B, wait an hour and then bomb the MDMA. Both of the drugs rough up my stomach a bit and this breaks that part up. Its kind of hard for something to go wrong, compared to other psychedelics. and even if you are uneasy from the 2C-B, its not *that* bad. Then you've settled into it before the MDMA takes effect. Then the whole thing goes all sparkly bouncy happy on you.
I'd definitely wait more than a week before taking any MDMA.... like maybe 6 weeks.
peace