Overview

St. John’s wort, additionally known as Hypericum perforatum, is a flowering shrub native to Europe. St. John’s wort will get its title as a result of it typically blooms on the birthday of the biblical John the Baptist.

The flowers and leaves of St. John’s wort have lively substances equivalent to hyperforin. St. John’s wort will be discovered as a complement in teas, tablets, liquids, and preparations which might be placed on the pores and skin.

Folks use St. John’s wort to deal with despair and signs of menopause.

What the analysis says

Analysis on St. John’s wort use for particular situations reveals how the complement could have an effect on these situations:

• Melancholy. Many research have discovered St. John’s wort to be useful in treating gentle to reasonable despair. In truth, some analysis has proven the complement to work in addition to many prescription antidepressants. It is unclear whether or not the complement helps deal with extreme despair.

  St. John’s wort interacts with many medicines. So it may not be an acceptable selection, particularly should you take any prescription medicines.

• Menopause signs. Some analysis means that taking St. John’s wort alone or with black cohosh or different herbs would possibly reduce menopause signs equivalent to sizzling flashes.
• Somatic symptom dysfunction. Some research have discovered that St. John’s wort would possibly assist deal with this situation. Somatic symptom dysfunction causes extreme anxiousness about bodily signs equivalent to ache, weak spot, and shortness of breath.

Our take

Warning

St. John’s wort can deal with gentle to reasonable despair. However the complement interacts with many medicines and may trigger critical unwanted side effects. Speak along with your healthcare skilled earlier than taking St. John’s wort should you take some other medicines.

Security and unwanted side effects

When taken by mouth for as much as 12 weeks in applicable doses, St. John’s wort is usually thought of secure. However it might trigger:

• Anxiousness.
• Dizziness.
• Diarrhea, constipation, and upset abdomen.
• Dry mouth.

Different unwanted side effects could embody:

• Tiredness and bother sleeping.
• Headache.
• Greater sensitivity to daylight, additionally known as photosensitivity.

There is not sufficient details about the protection of utilizing St. John’s wort on the pores and skin.

Do not use St. John’s wort throughout being pregnant or whereas breastfeeding.

Interactions

The listing under contains some recognized interactions when taking St. John’s wort. However different medicines additionally could work together with St. John’s wort. Test along with your healthcare skilled earlier than utilizing St. John’s wort together with some other medicines, particularly prescription medicines.

• Alprazolam (Xanax). For those who take St. John’s wort with this drugs used to ease anxiousness signs, it’d reduce the medication’s impact.
• Antidepressants. For those who take St. John’s wort with antidepressants, it’d increase the chance of a buildup of excessive serotonin ranges within the physique. An excessive amount of serotonin may cause gentle to extreme unwanted side effects. Get supervision from a healthcare skilled should you take St. John’s wort and an antidepressant.
• Barbiturates. If St. John’s wort is taken with a drugs that acts as a central nervous system depressant, known as a barbiturate, it’d reduce the quantity of sleep time the medication causes.
• Bupropion (Wellbutrin SR, Forfivo XL). For those who take St. John’s wort with this antidepressant, it’d reduce the medication’s impact.
• Sure chemotherapy medicines that deal with most cancers. For those who take St. John’s wort with irinotecan (Camptosar, Onivyde), docetaxel (Taxotere) or imatinib (Gleevec), it’d reduce the chemotherapy drugs’s results.
• Sure medicines that suppress the immune system. For those who take St. John’s wort with tacrolimus (Prograf, Astagraf XL, others) or cyclosporine (Neoral, Sandimmune, others), it’d reduce the medication’s impact.
• Sure statins. For those who take St. John’s wort with statins equivalent to atorvastatin, lovastatin, and others, it’d reduce how properly the statin works.
• Contraceptive medicines. Use of St. John’s wort with medicines used to forestall being pregnant, known as contraceptive or contraception medicines, would possibly trigger breakthrough bleeding, bleeding that is not common or being pregnant that is not deliberate. You would possibly want a second or totally different type of contraception.
• Cytochrome P450 1A2, cytochrome P450 2B6, cytochrome P450 2C19, cytochrome P450 2C9 and cytochrome P450 3A4 substrates. Do not take St. John’s wort should you’re taking a drugs affected by these enzymes. These enzymes are also known as CYP1A2, CYP2B6, CYP2C19, CYP2C9 and CYP3A4.
• Dextromethorphan. For those who take St. John’s wort with this cough suppressant, it’d increase the chance of the buildup of excessive serotonin ranges within the physique.
• Digoxin (Lanoxin). For those who take St. John’s wort with this coronary heart drugs, it might reduce the medication’s impact.
• Fexofenadine (Allegra Allergy). For those who take St. John’s wort with this antihistamine, it’d trigger an excessive amount of of the medication to construct up within the physique. This could worsen typical unwanted side effects.
• Ketamine (Ketalar). For those who take St. John’s wort with ketamine, it’d reduce the medication’s anesthetic impact.
• Narcotics. Do not take St. John’s wort with methadone (Methadose). Taking St. John’s wort with some narcotics would possibly reduce how properly the medicines work. Mixing the complement with narcotics additionally would possibly increase narcotic-induced sleep time and painkilling results.
• Non-nucleoside reverse transcriptase inhibitors. For those who take St. John’s wort with one in every of these anti-HIV medicines, it might reduce the medication’s impact.
• Omeprazole (Prilosec). Do not take St. John’s wort with this drugs used to deal with lasting heartburn. The complement can reduce how properly the medication works.
• Phenytoin (Dilantin, Phenytek). For those who take St. John’s wort with this anticonvulsant drugs, the medication may not work as properly to cease seizures.
• Photosensitizing medicines. For those who take St. John’s wort with drugs that will increase sensitivity to daylight, known as photosensitizing drugs, it’d increase the chance of a response.
• Protease inhibitors. For those who take St. John’s wort with this sort of antiviral drugs, it might reduce how properly the medication works.
• Triptans. Do not take St. John’s wort with these medicines that deal with migraines. The complement would possibly increase the chance of buildup of excessive serotonin ranges within the physique. An excessive amount of serotonin may cause gentle to extreme unwanted side effects.
• Voriconazole. For those who take St. John’s wort with this antifungal drugs, it’d reduce how properly the medication works.
• Warfarin (Jantoven). For those who take St. John’s wort with this drugs used to scale back blood clotting, it’d reduce how properly the medication works.

March 21, 2025