What Disqualifies You From Donating Plasma?
Most things that stop you from donating plasma are temporary. A failed finger prick, a new tattoo, a course of antibiotics, a blood pressure reading that came in high. You're out for a day, a week, or a few months, then you're back. Only a short list of conditions disqualifies you for good.
That's the short answer. Here's the longer one, sorted by whether you're out permanently, out for a while, or just out today.
First, the framing that explains all of it. Plasma eligibility runs on three layers of rules: federal regulations from the FDA, industry standards from the PPTA, and policies set by the specific chain that owns your center. Each layer can be stricter than the one above it, and your center's rules are the ones that apply at the time you donate.
The permanent disqualifiers are a short list
A confirmed positive test for HIV, hepatitis B, or hepatitis C ends eligibility for good. These are non-negotiable under FDA rules because plasma-derived medications go to immunocompromised patients who cannot risk exposure.
Beyond infectious disease, permanent deferrals cover injected-drug use (staff check arms and forearms for puncture marks and scarring), certain blood cancers like leukemia and lymphoma, and a history of Ebola. Severe cardiovascular disease can also keep you out for good, though that gets evaluated case by case by the center's medical staff. Some chronic autoimmune conditions, such as lupus or multiple sclerosis, may disqualify you or require a physician sign-off, depending on the condition and the chain.
Temporary deferrals are the bigger category
Most people who get turned away fall here. A new tattoo or piercing carries a waiting period that varies by state and chain; many centers use four months, though in states that regulate and license tattoo facilities the wait can be shorter or waived. Pregnancy defers you for its duration and for a period after delivery, miscarriage, or termination, often around six months postpartum.
Active infections defer you until you have recovered, and antibiotics for an active infection usually mean waiting until you finish the course. Recent surgery or a hospital stay can sideline you while your body recovers. Some medications carry their own waits: blood thinners like warfarin and heparin, and acne drugs like Accutane (commonly a one-month deferral). Travel matters too; time spent in a malaria-endemic area can defer you for months. Always disclose everything you take and everywhere you have been during screening, and let the staff decide whether it matters.
Your vitals and bloodwork get checked every visit
Even if nothing in your history disqualifies you, you must pass a screening every visit. The numbers that matter:
Weight: at least 110 pounds (50 kg), an FDA minimum with no upper limit
Total protein: between 6.0 and 9.0 g/dL
Hematocrit: commonly 38% for women and 39% for men
Blood pressure: roughly 90 to 180 systolic over 50 to 100 diastolic
Pulse: 50 to 100 beats per minute
A low finger prick is the most common same-day no, and it is fixable. So is blood pressure that spikes from stress or caffeine, or dehydration that slows your flow. These are not disqualifications so much as "not today." Eat iron-rich food, hydrate the day before and the morning of, and most people clear screening on the next attempt.
Some reasons have nothing to do with your health
You can be turned away for missing a valid government ID or proof of a local address. Showing up appearing to be under the influence of alcohol or drugs is an automatic deferral, and most centers ask you to avoid alcohol for 24 hours before donating. Knowingly giving false answers on the screening questionnaire can get you permanently deferred, since those answers exist to protect the patients who receive plasma-derived medications.
Bottom line
A confirmed HIV or hepatitis B or C diagnosis, IV drug use, and a few serious conditions disqualify you permanently. Almost everything else, including tattoos, pregnancy, medications, low iron, and a bad blood pressure reading, is temporary or fixable. Final eligibility is determined by center medical personnel at your donation center, so when you are unsure where you stand, ask them directly.