I took 200mg at 10:30. At 11:30 he still felt nothing, so I took another 100mg. At 12:30 there was still nothing, so he took another 50mg. So 350mg, and I don't even feel tired. Did Swim do something wrong...should he of taken the whole dose at once instead? Is it possible he is 'immune' to this drug? I was really looking forward to this night, but it seems to be a dud. Any ideas?