Criteria for blood donation eligibility are designed to protect the health and safety of two groups of people:

  • blood recipients (patients), and
  • blood donors

To assure consistency of safety standards for all donors and all patients, basic criteria used for blood donation eligibility are defined by the U.S. Food & Drug Administration.


What Determines Donation Eligibility?

Criteria for blood donation eligibility are designed to protect the health and safety of two groups of people:

  • blood recipients (patients), and
  • blood donors

To assure consistency of safety standards for all donors and all patients, basic criteria used for blood donation eligibility are defined by the U.S. Food & Drug Administration.


People Who Are Generally Healthy CAN BE INELIGIBLE to Donate Blood

Because the safety of both donors and patients is paramount, blood donation criteria are purposefully conservative-at times making generally healthy people ineligible. Most often the ineligibility is temporary, but on occasion it can be for indefinite periods of time.

Common, everyday circumstances that are not usually indications of ill health can cause temporary ineligibility to donate blood.


Examples of such circumstances relating to patient safety include:

  • recent dental work
  • recent travel outside of the U.S.
  • recent electrolysis, body piercing, tattoo
  • recent vaccination (including flu shots)
  • recent cold or infection


Examples relating to donor safety include:

  • low-but-normal hemoglobin level
    (the iron containing element of blood)
  • weight below 110 pounds
  • transient high blood pressure
  • actively breast feeding a child
  • minor pulse irregularities
  • aggressive weight loss efforts

The above list contains just a few of the reasons why one can be temporarily ineligible to donate blood. There are literally hundreds of other reasons-each intended to provide safety for patients and donors.


Regaining Eligibility to Donate Blood

The time it takes to regain eligibility to donate blood varies considerably, depending on the reason(s) for deferral. Some donors become eligible to try again the next day (e.g., low hemoglobin level, recent exposure to infection). Some donors must wait 1-3 years before trying again (travel outside the U.S. to malaria endemic areas). In general, approximately 80% of all temporarily ineligible donors regain eligibility within one week.


Ineligibility Can Be Indefinite

Sometimes generally healthy people can be ineligible indefinitely (permanently). Examples include people who: for unknown reasons have repeated, falsely abnormal test results, in-dwelling catheters, or similar restorative devices; or are members of groups the FDA has made ineligible because of having lived in certain countries or because of specific lifestyle behaviors. For such generally healthy people, indefinite ineligibility is quite frustrating, despite being based on the good intent of patient and donor safety.


If You ARE Temporarily Ineligible:

  • Don't be unnecessarily alarmed. Safety concerns often cause healthy people to be deferred temporarily.
  • Do ask us about specific reasons for your deferral. We'll be glad to explain.
  • Don't be discouraged about not being able to help a patient today. Consider that efforts to protect health and safety, while frustrating at times, DO help patients (and donors, too!).
  • Do consider trying to donate blood again in the future. Patients who need a transfusion need volunteer blood donors.

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