Can you drink alcohol while taking Alteplase Injection?
Last updated September 7, 2026.
No, you should not drink alcohol around the time you receive alteplase, because it is given during emergency hospital care and alcohol raises your bleeding risk. Alteplase (brand names include Activase and Cathflo Activase) is a clot dissolving medicine infused into a vein for stroke, heart attack, a clot in the lung, or a blocked catheter, so there is no window during the infusion when drinking would be safe or possible. The bleeding risk stays elevated for roughly the first day after the dose, and your team will watch your blood pressure and neurologic signs closely during that time. Alcohol makes platelets less able to clot, raises blood pressure, and can mask confusion or weakness that staff need to detect early. Heavy or long term drinking also lowers the clotting factors your liver makes, which compounds the effect. Once you are recovering, ask your clinician when alcohol is reasonable again, since many people go home on aspirin or another blood thinner that carries its own limits.
What to do
- Skip alcohol entirely that day: Do not drink in the hours before or the 24 hours after an alteplase infusion.
- Report your usual intake: Tell the care team how many drinks you have in a typical week so they can plan for withdrawal risk.
- Watch for bleeding: Report new bruising, black stools, blood in urine, a bad headache, or bleeding that will not stop.
- Ask about the next medicine: Alcohol limits often tighten if you go home on aspirin, clopidogrel, warfarin, or a newer blood thinner.
- Set a restart date with your clinician: Get a clear answer on when and how much you can drink rather than guessing at home.
- Call 911 for stroke signs: Sudden face drooping, arm weakness, or trouble speaking needs emergency care immediately, since alteplase works only in a narrow time window.
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