Some medications, such as antibiotics or anticonvulsants, can cut or decrease the effect of the birth control pill, injection, implant, patch or vaginal ring, as they can interfere with hormone metabolism or reduce its absorption, altering the amount of hormones in the body. bloodstream and increasing the risk of unwanted pregnancy.
In addition, some drugs can cause changes in the intestinal flora and lead to diarrhea, which can interfere with the absorption of the hormones of the contraceptive pill, reducing its effectiveness. See other situations that can cut the contraceptive effect.
Therefore, the use of medication with contraceptives should always be guided by the gynecologist, who may recommend the use of an extra contraceptive, such as a condom, in order to prevent pregnancy.
Some remedies that can cut or reduce the effect of contraceptives are:
Antibiotics such as rifampicin and rifabutin to treat tuberculosis, leprosy or bacterial meningitis can reduce the effect of the contraceptive pill, vaginal ring, patch or hormonal implant, and therefore the use of some extra contraceptive method in these cases, such as condoms, or switching to another contraceptive method, such as a copper or hormonal IUD, should be discussed with the gynecologist beforehand.
These two are the only antibiotics that have been proven to reduce the contraceptive action of the pill, by altering enzymes responsible for the metabolism of hormones present in contraceptives, reducing the amount of these hormones in the bloodstream and reducing their effectiveness. However, although controversial, other antibiotics can affect the effectiveness of the contraceptive pill, such as penicillins, tetracyclines, erythromycin or clarithromycin, for example.See other antibiotics that can interfere with contraceptives.
Medicines used to reduce or eliminate seizures can also compromise the effectiveness of birth control pills, such as phenytoin, phenobarbital, carbamazepine, oxcarbamazepine, primidone, topiramate or felbamate.
If it is necessary to use anticonvulsants, you should talk to the doctor responsible for the treatment, who prescribed the anticonvulsants, as there are already drugs of this class that can be used safely with contraceptives, such as valproic acid, lamotrigine, tiagabine, levetiracetam or gabapentin, for example.
3. Natural Remedies
Phytotherapics, popularly known as natural remedies, can also interfere with the effectiveness of the contraceptive pill. An example of a natural remedy that interferes with contraceptive activity is saw palmetto, which is a medicinal plant widely used to treat urinary problems and impotence.See other uses of saw palmetto.
St John's wort, or St John's wort, used for the natural treatment of depression, is also not indicated for consumption while taking the pill, as it alters the hormonal concentration in the bloodstream, reducing its effectiveness. In addition, it is possible that this medicinal plant also interferes with the effect of the hormonal patch and the vaginal ring.
Thus, in case of using any of these medications, even if they are natural, one should have the gynecologist's guidance, continue taking the pill normally, but use barrier condoms, such as condoms, in all intercourses.
Griseofulvin, an antifungal indicated for the treatment of skin or nail mycoses, for example, can interfere with the hormone levels of birth control pills and reduce their effectiveness in preventing pregnancy.
In addition, other antifungals used to treat mycoses, whether oral or topical, such as ketoconazole, itraconazole, voriconazole or clotrimazole, are not indicated for women who use birth control pills, so if it is necessary to use antifungal agent, you should inform the gynecologist before starting treatment.
Antiretroviral drugs used to treat HIV and AIDS, such as lamivudine, tenofovir, efavirenz and zidovudine, may reduce the effectiveness of oral contraceptives..
Thus, if the person is treated with any of these remedies, the use of the contraceptive pill is not indicated, and condoms should be used as one of the possible methods of contraception.
6. Other remedies
Other drugs that can also affect the effectiveness of contraceptives are:
For women who use the contraceptive pill, but who need to be treated with other medications, the doctor responsible for the treatment must first be contacted, so that another medication can be indicated or another contraceptive method option considered.Find out about other contraceptive methods besides the pill.