Can You Donate Blood if You Smoked Weed?
In July 2019, the American Red Cross reported an emergency need: blood donations were going out to hospitals faster than they were coming into donation centers.
While blood donation centers are no longer in a state of emergency, there is still a critical need. Every two seconds, someone in the United States needs blood, yet only 10% of the eligible population — which is less than 38% of Americans — donates.
The basic eligibility guidelines state that you must be at least 16 years old with parental consent in some states or 17 years old without consent in most states, weigh at least 110 pounds and have not donated in the past 56 days.
Here is what the American Red Cross said when we asked about cannabis use and donating blood: Yes, you can donate if you’ve smoked marijuana. However, you cannot donate if you’ve smoked or ingested a synthetic form of the drug.
Synthetic marijuana — also known as K2 or Spice — is a human-made chemical with a similar make-up to the marijuana plant. It is classified under the group called new psychoactive substances (NPS) and is considered to be an unregulated, mind-altering substance.
There is an FDA-approved medication called Marinol that has man-made THC in it. If you are taking Marinol for a medical condition, such as nausea from chemotherapy or loss of appetite from HIV infection, you would not be eligible for blood donation. If you have taken Marinol and do not have a pre-existing medical condition, you would not be deferred, as it is FDA-approved.
So, if you have smoked or ingested non-synthetic marijuana, are otherwise in good health and meet the basic donation guidelines, you can donate.
There is one final stipulation to note. While it is OK to have medical or recreational cannabis in your system, if you are under the influence of the drug at the time of donation, you will be deferred. That rule goes for licit and illicit drugs and alcohol.
Want to make sure you get a safe form of marijuana when purchasing it? Here are 25 things you should know before buying it.
Less than 50% of Americans are eligible to donate blood at any given time, so it’s helpful to know your reasons for ineligibility.
Can You Give Blood If You Smoke?
According to the National Heart, Lung, and Blood Institute (NHLBI), nearly 5 million Americans receive blood transfusions each year.
There are many reasons why someone could need a blood transfusion, such as:
- a severe accident or injury
- diseases or conditions such as anemia and hemophilia
The blood that’s used for this important procedure is collected through the process of blood donation. Donating blood is a great way to help someone who’s in need of a blood transfusion.
When you donate blood, you’ll need to answer some questions about your health, lifestyle, and travel history to determine your eligibility.
Does smoking disqualify you from donating blood? Read on to learn more.
Smoking cannabis doesn’t disqualify you from giving blood. However, the clinic is likely to turn you away if you show up to your appointment visibly high.
In a statement to Healthline, the American Red Cross said: “While the Red Cross does not encourage the use of controlled substances, marijuana, cigarettes or alcohol use does not necessarily disqualify a person from giving blood. Potential donors cannot give while under the influence of licit or illicit drugs or alcohol. Legal or illegal use of marijuana is not otherwise a cause of deferral.”
Smoking cigarettes in and of itself doesn’t disqualify you from donating blood.
If you smoke and you want to donate blood, plan to refrain from smoking on the day of your appointment — both before your appointment and for three hours afterward.
Smoking before your appointment can lead to an increase in blood pressure. This may disqualify you from donating. Smoking afterward may lead to dizziness.
In the United States, possible disqualifiers can include, but aren’t limited to:
- using illicit injection drugs
- using injection drugs not prescribed by your doctor, such as steroids
- feeling sick or having an acute infection on or before the day of your appointment
- being pregnant or having given birth within the past six weeks
- receiving a tattoo or piercing within the past year
- getting a blood transfusion or an organ transplant in the past year
- having HIV or testing positive for hepatitis B or C
- having had leukemia, lymphoma, or other cancers of the blood
- having had the Ebola virus
- having an inherited blood clotting disorder
- being a man who’s had sexual contact with other men within the past year
It’s important to discuss these things when you arrive at the clinic to determine if any of them apply to you.
Using certain medications may temporarily disqualify you from donating blood. They include:
- acitretin, a drug used for severe psoriasis
- blood thinners, such as warfarin (Coumadin, Jantoven) and heparin
- dutasteride (Avodart, Jalyn), which is used for enlarged prostate
- isotretinoin (Amnesteem, Claravis), an acne drug
- teriflunomide (Aubagio), which is used to treat multiple sclerosis (MS)
Depending on the medication, you may have to wait anywhere from two days to three years after your last dose until you’re eligible to donate blood again.
In rare cases, having used certain medications will permanently disqualify you from donating blood. This includes human pituitary-derived growth hormone and the psoriasis drug etretinate (Tegison), both of which are now banned in the United States.
Your travel history can also determine whether you’re eligible to donate blood. You may be subject to a waiting period if you’ve recently traveled to a country with a high risk of malaria, such as Brazil, India, or parts of sub-Saharan Africa.
You may not be eligible to donate if you’ve spent an extended amount of time in places where variant Creutzfeldt-Jakob disease (vCJD) is found, such as many countries in Europe. vCJD is a rare condition more commonly known as “mad cow disease.”
Having previously received a blood transfusion in France or the United Kingdom, both areas where vCJD is found, would also make you ineligible to donate.
Even though smoking doesn’t disqualify you from donating blood, it can eventually lead to conditions that can be disqualifiers for blood donation. These can include:
- Cancers. You can’t donate if you’re currently being treated for cancer or if you’ve had leukemia or lymphoma. People who’ve had other types of cancer may need to wait one year after successful treatment.
- High blood pressure. If your blood pressure is too high at the time of donation, you may not be able to donate.
- Heart and lung disease. If you’re actively having symptoms of a heart or lung condition, you’re not eligible for donation. Additionally, if you’ve had a heart attack or stroke, you may need to wait up to six months before donating.
There are certain stimulants and drugs that can disqualify you from giving blood, but can you donate blood if you smoke? In many cases, the answer is yes. Learn more about the factors that determine whether you’re eligible to give blood. We'll tell you what you can do and how you can be a donor, even if you do smoke.