Barbiturates + Alcohol
Barbiturates + Alcohol: the short answerBarbiturates have a narrow safety margin on their own, and alcohol narrows it to almost nothing — this pairing has a long history of fatal overdoses. Any unresponsiveness after mixing them is an emergency.
Why it’s dangerous
Barbiturates (secobarbital, pentobarbital, butalbital and others) directly activate GABA-A receptors and, at higher doses, open chloride channels on their own — which is why they are so much more dangerous than benzodiazepines. Alcohol amplifies the same receptor system, and the two together can shut down breathing and blood-pressure regulation at doses neither would reach alone.
What happens
- Extreme drowsiness, slurred speech, and staggering
- Progression to deep unconsciousness and stopped breathing
- Dangerously low blood pressure and body temperature
- High risk of choking on vomit
Warning signs
- Cannot be woken at all
- Very slow, shallow, or irregular breathing
- Cold, clammy, bluish skin; weak pulse
What to do
- Call emergency services immediately — barbiturate overdoses can deteriorate quickly
- Recovery position; monitor breathing continuously; CPR if trained and needed
- Naloxone does not help here — do not waste time on it unless opioids might also be involved
- Never drink on any barbiturate, including butalbital-containing headache pills (Fioricet/Fiorinal)