Fits with cannabis and PEAs

[Sumph]

Hi, around a year ago my friend experienced fits while on what he believed to be MDMA, he has discontinued use of this. This weekend, while smoking cannabis he experienced a similar episode, I was wondering if anyone has had any experience with this? My questions are; 1) Is this a recognised side effect of cannabinoids and PEAs? If so would tryptamines for example or another class of chemicals be safer? 2) Can epilepsy be triggered by drug use? (these could be epileptic fits?) 3) As a last resort, is alcohol relatively safe with these symptoms (I'm thinking later in life). I'm sorry if this is in the wrong section, but any feedback would be appreciated.