To qualify for plasma donation, you need to meet a set of health, age, and weight requirements that are checked every time you visit a donation center. Most healthy adults who weigh at least 110 pounds can donate, but the screening process is more thorough than many people expect, especially on your first visit.
Age, Weight, and ID Requirements
You must weigh at least 110 pounds on the day of donation. Most centers require donors to be at least 18 years old, though some states allow 16- or 17-year-olds with parental consent. There’s no universal upper age limit, but centers will evaluate your overall health more carefully as you get older.
For your first visit, bring three things: a government-issued photo ID, proof of your current address (a driver’s license or utility bill works), and proof of your Social Security number, such as a Social Security card, W-2, or paystub. The name on your Social Security document must match your ID exactly.
Vital Signs Checked Before Every Donation
Staff will check your blood pressure, pulse, and temperature before each donation. Your systolic blood pressure (the top number) must fall between 90 and 180, and your diastolic (bottom number) must be between 50 and 100. Your pulse needs to be regular and between 50 and 100 beats per minute. If any of these readings fall outside range on a given day, you’ll be turned away for that visit but can try again later.
Blood Tests You’ll Need to Pass
Before donating, a small finger-prick sample is used to check your hemoglobin or hematocrit level, which measures the oxygen-carrying capacity of your blood. For men, the minimum hemoglobin is 13.0 g/dL (or a hematocrit of 39%). For women, the minimum is 12.5 g/dL (or a hematocrit of 36%). If your levels are too low, you’ll be deferred for at least 30 days.
Protein levels in your blood are also tested, since the whole point of plasma donation is collecting the protein-rich liquid portion of your blood. Centers check total protein to make sure donating won’t deplete you below a safe level. First-time donors typically have additional blood tests, including screening for HIV, hepatitis B and C, and other infectious diseases.
Conditions That Permanently Disqualify You
Some medical conditions mean you can never donate plasma:
- HIV or AIDS, even if you’re on treatment
- Hepatitis B or C
- Sickle cell disease
- Leukemia or lymphoma
A diagnosis of variant Creutzfeldt-Jakob disease (the human form of mad cow disease) is also a permanent disqualifier, though this is extremely rare.
Temporary Deferrals and Wait Times
Many situations only pause your eligibility for a set period. Here are some of the most common:
- Cold or flu: Wait 48 hours after symptoms resolve.
- Antibiotics: Wait 24 hours after your last dose, as long as you have no remaining signs of infection.
- Tattoos or piercings: Wait 3 months if done with reusable instruments or in a state that doesn’t regulate tattoo facilities. Tattoos from regulated shops using single-use equipment typically don’t require a wait.
- Dental work: 24 hours after a routine cleaning, 72 hours after extractions, root canals, or oral surgery.
- Pregnancy: Wait at least 6 weeks after the pregnancy ends.
- Blood transfusion: 3-month wait.
- Major surgery: You must be fully recovered and back to your normal activity level.
- Active herpes or cold sores: Wait until lesions have completely healed.
- Other cancers (not leukemia/lymphoma): 2 years after surgery or treatment, with no evidence of recurrence.
Medications That Affect Eligibility
Several common medications trigger a deferral period. Blood thinners like warfarin require a 7-day wait after your last dose, while newer blood thinners like apixaban or rivaroxaban require just 2 days. If you take anti-platelet drugs like clopidogrel, the wait is 14 days.
Isotretinoin, the prescription acne medication, requires a 1-month wait. Finasteride, used for hair loss or prostate symptoms, carries a 6-month deferral. Oral HIV prevention medications (PrEP) like tenofovir/emtricitabine require a 3-month wait, while injectable forms like cabotegravir require a 2-year wait.
Narcotics taken for pain relief will also disqualify you while you’re actively taking them. If you’re on any prescription medication and aren’t sure about your eligibility, the donation center will review your medications during screening.
Travel Restrictions
Travel to regions where malaria is common triggers a 3-month deferral from the date you return. This includes parts of India, Mexico, China, Africa, South and Central America, the Caribbean, and the Philippines. The CDC maintains updated maps showing which specific areas carry malaria risk, since not every part of these countries qualifies.
If you previously lived in a malaria-risk country, you need to have resided in a non-endemic country for three full years without traveling back to a malaria-risk area. The good news: the longstanding deferrals related to mad cow disease risk from travel to the UK and Europe were eliminated in 2023. Only an actual diagnosis of vCJD disqualifies you now.
What Your First Visit Looks Like
Expect your first appointment to take significantly longer than future visits. You’ll fill out an extensive health history questionnaire covering your medical background, medications, sexual history, and travel. A staff member will conduct a brief physical exam. Your vitals will be checked, and blood samples will be drawn for testing. The actual plasma collection takes about 45 minutes to an hour once you’re approved, but the full first visit can run two to three hours with all the screening.
Return visits are faster since the health questionnaire is shorter and you’ve already completed the initial screening. Most centers allow you to donate plasma twice per week, with at least one day between donations. Your vitals and hemoglobin are still checked each time, so a bad reading on any given day can temporarily sideline you even if you’ve been donating regularly.