can i smoke weed on birth control

Does Marijuana Affect Birth Control?

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Recreational marijuana is legal in 11 U.S. states and Washington, D.C., but there are still many gray areas when it comes to the health effects of using cannabis. Research is still being done on marijuana secondhand smoke as well as the benefits and risks of trendy products like CBD. However, there have been many studies that have shown marijuana can interfere with some medications.

Almost 13% of women age 15-49 are currently using birth control pills for contraception, while more than 10% use long-acting reversible contraception like intrauterine devices (IUDs) and implants, according to the Centers for Disease Control and Prevention. It’s no surprise, therefore, that many women would be concerned about the risks associated with mixing marijuana with birth control.

While there have been studies on marijuana use and fertility, there is limited research on the interaction of marijuana and birth control. Despite this, many birth control brands come with warnings that there could be adverse effects when their pill or patch is combined with marijuana.

Marijuana may have effects that counteract estrogen, potentially making estrogen-based birth control pills — as well as patches, injections and rings — less effective. However, there’s no data to suggest that marijuana decreases the effectiveness of birth control.

Certain hormone-based contraception also comes with a warning that it can theoretically decrease the elimination of marijuana from the body, meaning the effects of marijuana could be more severe or last longer.

Cardiovascular issues are also a concern for combining marijuana and contraceptives. Cigarette smoking already increases the risk of serious cardiovascular side effects from oral contraceptive use, and smoking marijuana could have a similar effect.

Researchers are also investigating the effect of marijuana on blood pressure, with some linking cannabis to higher blood pressure but others finding CBD decreases blood pressure. Birth control pills, patches and IUDs can all increase blood pressure, risk of blood-clotting problems and other heart issues.

The lack of research on how marijuana affects the health of women, in particular, is one reason more and more women are being inspired to dive into the fields of marijuana research and law as well as becoming pioneers in the marijuana industry.

Marijuana may make birth control pills less effective, but there are other factors to consider before using birth control and marijuana at the same time.

Does smoking pot affect my birth control?

By Teen Health Source

It’s important to be clear that so far (as of September 2020) there hasn’t been enough research on cannabis and birth control to come up with any solid conclusion on how they interact. Most of the info you can find online right now is from really early studies or on theoretical works. This doesn’t mean that there’s no interaction between birth control and cannabis, but just that there’s not a clear answer on if smoking pot for sure makes birth control less effective.

So with that being said, let’s go over the data that is out there:


Right now when research is exploring the effects from cannabis, it’s mainly talking about two things: THC and CBD.

THC (tetrahydrocannabinol) is the thing in cannabis that is responsible for its intoxicating, psychoactive effects. This is what makes people high.

On the chemistry side, there’s a theory that THC may interrupt signaling between estrogen receptors in your body. This could potentially affect how your body absorbs and responds to estrogen in birth control, possibly making it less effective.

THC can also have side effects on your general health, not just your reproductive health. THC can cause an increased heart rate, which could potentially increase your risk of blood clots. Being on birth control can also increase your risk of blood clots, as can a family history of blood clots, smoking, or being over 35 years old. If you are at a higher risk for getting blood clots because of factors like age or family history, your clinician may recommend that you avoid smoking or consuming THC.

CBD (cannabidiol) is the part of cannabis that is responsible for creating feelings of relaxation and calm. It has little to no intoxicating effect.

When CBD is absorbed into the body, it can sometimes monopolize certain metabolic enzymes. For example, when your liver enzymes are flooded with CBD, they become monopolized by it and your liver can’t process any other compounds until the CBD is gone. In theory this could impact if and when your body is able to process the hormones in birth control, possibly making it less effective.

Some studies suggest that estrogen-containing hormonal birth control (i.e., certain birth control pills, patches, and rings) are more impacted by CBD enzymes, which can possibly make them less effective. This does not seem to be the case for progestin-only hormonal birth control (i.e., birth control pills, hormonal IUDs, or the injection).

How does it get into your body?

The way that drugs or medications interact can depend on how they get into the body. For example, if you’re eating edibles and taking the birth control pill, they are both being absorbed by the stomach. Both of them getting absorbed in the same way could potentially cause them to interact. If you smoke pot and have a hormonal IUD, they are less likely to have an interaction, as things are getting absorbed separately in your lungs and in your uterus.

Cannabis and Pregnancy Risk

The article Research Says Smoking Cannabis May Lower Chances of Getting Pregnant from 2019 covers findings which indicate that:

  1. Cannabis increases sperm count.
  2. Cannabis decreases sperm concentration.
  3. Cannabis can delay ovulation by up to 2 days.

However, there are a number of factors that can mean these results are inaccurate or only temporary. How often someone uses cannabis (occasional vs regular users) might affect how strong of an impact the drug has on your body. There is also some evidence that bodies can adapt to cannabis use over time, so the effects might not be so strongly felt after a number of years.

Where are you getting your information from?

As we noted at the beginning, there hasn’t yet been enough research done to say conclusively how smoking pot will affect your birth control. As more studies and articles come out in the subject, it’s worth paying attention to where you’re getting the information from. Important things to notice include:

How recent is the data?

The more recent the study or the article, the more likely it is to include the latest information.

Who was in the study?

There are currently no studies that monitor human subjects who are using hormonal birth control and smoking pot. Until then, the results are necessarily relevant or specific to how it works in humans.

Who is publishing the article?

Most of the articles that are easy to find online are from cannabis-specific outlets, either from companies that sell cannabis products or news outlets that make money off of selling ads to cannabis companies. While this doesn’t mean everything they share is sketchy, they certainly have a pro-pot bias that could impact how certain findings are interpreted. Be sure to check an article’s sources, see if you can look at the original studies, or find another news outlet that is also talking about the new data.

If you ever have questions about how different drugs and medications might interact, we always recommend checking in with a clinician or pharmacist.


  • RX Leaf: Does Cannabis Make Birth Control Ineffective?
  • RX Leaf: Research Says Smoking Cannabis May Lower Chances of Getting Pregnant
  • HealthLine: CBD vs. THC – What’s the Difference?
  • Flowertown: Does cannabis affect my birth control?
  • Doc MJ: Can You Use Cannabis in Ohio if You’re on Birth Control?

If you have questions about this topic, feel free to contact one of our peer educators. [Link]

It's never a bad idea to see if what medications might interact with your birth control, but does that include cannabis? Maybe yes! Check this post to learn more about the state of information out there about pot and hormonal birth control.