The past three times I've taken ecstasy I've had serizure-like episodes the next day or toward the very end of the comedown. The episodes occur after being seated or in bed for some time, upon standing and walking a few steps I get overwhelming dizziness accompanied by blindness. I stumble, shaking violently, but have been able to keep myself upright by leaning against a doorway or wall. .The episodes last for about ten seconds before I realize what's happening and snap myself out of it.
This also happened the first time I smoked cannabis after several months. I'm not sure if they're seizures; I've never had a history of seizures, but my sister has.
Could this be an allergic reaction of sorts? Could I not be getting sufficient oxygen to my brain because of the drugs?
First time poster, thanks in advance for any insight.