Substance-induced seizures typically occur with:
- Stimulant overdose (cocaine, amphetamines, MDMA) — overstimulation, hyperthermia
- GABA withdrawal after prolonged use of alcohol, benzodiazepines, GHB/GBL — withdrawal seizure
- Serotonin syndrome (see its own scenario) — seizures as a late symptom
First-ever seizure or a seizure after a head injury: always call 112, even if it lasts under 5 minutes.
After the seizure, confusion, fatigue and gaps in memory are normal. The person needs someone with them until they are clear again — and a medical check-up as the next step.