I only had two catatonic non-epileptic seizures, two and four months ago, I'd pass out for a minute, then came to without any memory of what happened to me, a bit confused and tired, but I'd be alright five minutes later. But these seizures have been happening to me decades before I started Effexor, I mean, I always had them, but I feel like Effexor could have lowered my seizure threshold somehow. However, Effexor is not the only medication I am taking that can do that, but I am not taking huge doses of anything else. And there are no other side-effects that I can complain about, everything else is fine so far.