Taking certain medications may exclude you from donating blood, platelets or plasma. Be sure to list all medications that you take before giving blood. Talk with your health care provider before starting or stopping any medications.
If you are taking antibiotics, then you will need to wait for 24 hours after your last dose before you can donate blood.
The following tables list common medications that may prevent you from donating, at least temporarily.
Antiplatelet drugs
Antiplatelet drugs affect how platelets work. They can be prescribed to help prevent strokes or heart attacks. If you take any of these, you may not be eligible to donate platelets for a certain time period. You may still be able to donate whole blood.
| Drug name(s) | Do not donate if the drug was taken in the last… |
| Effient (prasugrel) | 7 days |
| Brilinta (ticagrelor) | 7 days |
| Plavix (clopidogrel) | 14 days |
| Ticlid (ticlopidine) | 14 days |
| Zontivity (vorapaxar) | 14 days |
| Feldene (piroxicam) | 2 days |
Anticoagulants
Anticoagulants, or blood thinners, prevent blood from clotting. If you take these drugs and donate blood, you may experience excessive bleeding and bruising. These drugs are used to treat or prevent blood clots and prevent strokes.
| Drug name(s) | Do not donate if the drug was taken in the last… |
| Xarelto (rivaroxaban) | 2 days |
| Fragmin (dalteparin) | 2 days |
| Lovenox (enoxaparin) | 2 days |
| Pradaxa (dabigatran) | 2 days |
| Eliquis (apixaban) | 2 days |
| Savaysa (edoxaban) | 2 days |
| Coumadin, Jantoven, Warfilone (warfarin) | 7 days |
| Heparin | 7 days |
| Arixtra (fondaparinux) | 7 days |
Drugs that can harm an unborn baby
Drugs that can harm an unborn baby (fetus) belong to different classes of medications and treat different health issues.
- Isotretinoin products treat acne.
- Finasteride, dutasteride and tamsulosin treat benign prostatic hyperplasia (BPH).
- Finasteride products also treat hair loss.
- Vismodegib and sonidegib are used for basal cell skin cancer.
- Teriflunomide treats relapsing multiple sclerosis.
- Thalomid is used for multiple myeloma.
- Mycophenolate mofetil is used to prevent organ rejection in transplants.
- Acitretin is a treatment for psoriasis.
| Drug name(s) | Do not donate if the drug was taken in the last… |
| Amnesteem, Absorica, Claravis, Myorisan, Zenatane (isotretinoin) | 1 month |
| Propecia, Proscar (finasteride) | 1 month |
| Avodart (dutasteride) | 6 months |
| Jalyn (dutasteride and tamsulosin) | 6 months |
| Erivedge (vismodegib) | 2 years |
| Aubagio (teriflunomide) | 2 years |
| Odomzo (sonidegib) | 20 to 24 months |
| Thalomid (thalidomide) | 1 month |
| Cellcept (mycophenolate mofetil) | 6 weeks |
| Soriatane (acitretin) | 3 years |
Other considerations
You must also wait a year to donate blood if:
- You’ve been exposed to hepatitis B or received hepatitis B immune globulin, or
- You’ve taken experimental medications or vaccines as part of a clinical trial
The following drugs are no longer available in the United States. If you’ve taken them in the past, you can never donate blood:
- Growth hormone from human pituitary gland
- Insulin from cows (known as bovine insulin) that came from the United Kingdom