I think I read about seizures from cold turkey which required a 35 week long tapering schedule to avoid. Checking for a source I don't find this mentioned in official side-effects, only less formal guidance for addicts. Strange.
Seizures can also be caused in "overdose", which is unfortunately very very close to "recreational" doses. It's a very very weird drug in terms of secondary side-effects, the "SSRI" side can cause dangerous issues as well (serotonin toxicity when coupled with other serotonin affecting drugs).