Reference · 2026
Substance interactions.
Pharmacology, concrete risks and harm-reduction for the 30 most-searched substance combinations. Each combo has its own page with mechanism notes, what to watch for, and what to do if you already mixed.
For arbitrary multi-substance combos use the interactive checker.
- DangerousCocaïne + AlcoholMechanism, risks, harm reduction
- DangerousKétamine + AlcoholMechanism, risks, harm reduction
- DangerousXanax (Alprazolam) + AlcoholMechanism, risks, harm reduction
- DangerousXanax (Alprazolam) + OpioïdesMechanism, risks, harm reduction
- DangerousValium (Diazépam) + AlcoholMechanism, risks, harm reduction
- DangerousGHB / GBL + AlcoholMechanism, risks, harm reduction
- DangerousGHB / GBL + KétamineMechanism, risks, harm reduction
- DangerousTramadol + AlcoholMechanism, risks, harm reduction
- DangerousTramadol + MDMAMechanism, risks, harm reduction
- UnsafeMDMA + AlcoholMechanism, risks, harm reduction
- UnsafeMDMA + CocaïneMechanism, risks, harm reduction
- UnsafeAmphétamine + AlcoholMechanism, risks, harm reduction
- UnsafeMéphédrone + AlcoholMechanism, risks, harm reduction
- UnsafeMéphédrone + MDMAMechanism, risks, harm reduction
- UnsafeGHB / GBL + MDMAMechanism, risks, harm reduction
- CautionMDMA + CannabisMechanism, risks, harm reduction
- CautionMDMA + LSDMechanism, risks, harm reduction
- CautionMDMA + KétamineMechanism, risks, harm reduction
- CautionCocaïne + CannabisMechanism, risks, harm reduction
- CautionCocaïne + KétamineMechanism, risks, harm reduction
- CautionKétamine + MDMAMechanism, risks, harm reduction
- CautionLSD + AlcoholMechanism, risks, harm reduction
- CautionLSD + CannabisMechanism, risks, harm reduction
- CautionLSD + MDMAMechanism, risks, harm reduction
- CautionChampignons à psilocybine + AlcoholMechanism, risks, harm reduction
- CautionChampignons à psilocybine + CannabisMechanism, risks, harm reduction
- CautionAmphétamine + CannabisMechanism, risks, harm reduction
- Caution2C-B + MDMAMechanism, risks, harm reduction
- UnknownLSD + Champignons à psilocybineMechanism, risks, harm reduction
- UnknownXanax (Alprazolam) + CocaïneMechanism, risks, harm reduction