Will St. John’s Wort Affect Birth Control?

st-johns-wortHerbal remedies are very popular around the world. Many people prefer them to pharmaceuticals because they believe herbs can elicit positive results without serious side effects. However, plants produce a wide variety of chemicals at varying concentrations, and might have a number of effects on your body, both good and bad. Furthermore, since herbal supplements are not evaluated by the FDA for safety or effectiveness, consumers often don’t have ready access to evidence about herbal products. We can’t even be sure that they contain the ingredients that are listed on the label!


St. John’s wort might decrease the effectiveness of birth control pills, and might be unsafe during pregnancy.


One popular herb is St. John’s wort, or Hypericum perforatum. While the scientific evidence is mixed at best, many people believe that St. John’s wort can be used as an antidepressant. However, people often treat themselves with herbal supplements without guidance from a medical doctor or pharmacist — and without knowing whether or not these herbs are safe to use with any medications they might be taking.

Over the millennia, plants have evolved all sorts of powerful chemicals, such as toxins, to defend themselves against insects and other predators. For this reason, we can’t assume that plants only contain inert chemicals that won’t affect us or interact with the chemicals in other drugs and supplements we use. St. John’s wort, in fact, contains chemicals that interfere with other medications. It has been banned in France, and other countries require or are considering warning labels on St. John’s wort products so consumers can be aware of possible drug interactions. Continue reading

Over 90 Percent of What Planned Parenthood Does, Part 5: Thyroid Testing

Diagram of human head and neck, illustrating thyroid gland.

Image: Medline Plus

Welcome to the latest installment of “Over 90 Percent of What Planned Parenthood Does,” a series on Planned Parenthood Advocates of Arizona’s blog that highlights Planned Parenthood’s diverse array of services — the ones Jon Kyl doesn’t know about.

“When was the last time you had your thyroid checked?” the nurse practitioner asked me. I was at my annual exam, discussing heavy menstrual bleeding.

“I’m not sure,” I replied. “Maybe never?”

Really, I was thinking to myself, What’s a thyroid?

As it turns out, the thyroid gland does a lot of the work that regulates the body’s metabolism, which is sort of a big deal for overall health. It means that when the thyroid is overactive — as in the case of hyperthryoidism — or when the thyroid is underactive — as in the case of hypothyroidism — symptoms can show up in a variety of areas, such as: Continue reading