Addiction glossary · Safety
Cocaine Overdose: Signs & What to Do
A cocaine overdose is when the dose overwhelms the body faster than it can cope. Because cocaine is a powerful stimulant, the danger lands mainly on the heart and the brain — it can trigger a heart attack, a stroke, a seizure or a dangerously high body temperature. There's no "safe" amount: an overdose can happen to a first-timer or a long-term user, and it doesn't always take a large dose.
Warning signs
- Chest pain, or a racing, pounding or irregular heartbeat
- Difficulty breathing
- Extreme agitation, panic, confusion or paranoia
- A very high temperature, heavy sweating, hot skin
- Tremors, twitching or a seizure (fit)
- Signs of stroke — face drooping, weakness on one side, slurred speech
- Collapse or loss of consciousness
What to do
- Call 999 / 112 straight away. Cocaine overdose is a medical emergency. It's better to call and be wrong than to wait.
- Stay with them and keep them cool — remove layers, get air. If they're unconscious but breathing, put them in the recovery position.
- Tell the paramedics exactly what was taken, including any alcohol or other drugs. No one is in trouble — it helps them help.
- Don't assume they'll "sleep it off." Heart and temperature problems can build even as someone seems to settle.
Why the risk climbs
Two things raise the danger sharply: mixing cocaine with alcohol (the body forms a longer-lasting, more toxic substance called cocaethylene), and returning to an old dose after a break, when your tolerance has fallen. Redosing through a night stacks the total up fast. If the fear of an overdose is in your head at all, that's worth listening to — it's reason to stop and reach out, not to push on.
Frequently asked questions
Can you overdose on cocaine?
Yes. Cocaine can cause heart attack, stroke, seizures and dangerous overheating — and it can happen without a large dose, including in people with no known heart problem.
What makes a cocaine overdose more likely?
A higher dose, redosing through a session, mixing with alcohol, going back to an old amount after a break (lost tolerance), and any underlying heart condition.
Frightened by how close it's getting?
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