Why do we keep using pills to treat endometriosis? Which pills are suitable and which are not? What are the side effects?

You can also find more details about the pills here:
   • Alles was Du über Pillen wissen musst...   (how pills work)
   • Pillen-Nebenwirkungen - alles über Ve...   (side effects of pills)

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LITERATURE
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1. Becker CM, Bokor A, Heikinheimo O, et al (2022) ESHRE guideline: endometriosis. Human Reproduction Open 2022:hoac009. https://doi.org/10.1093/hropen/hoac009

2. Bick AJ, Louw-du Toit R, Skosana SB, et al (2021) Pharmacokinetics, metabolism and serum concentrations of progestins used in contraception. Pharmacology & Therapeutics 222:107789. https://doi.org/10.1016/j.pharmthera....

3. Hofmann BM, Apter D, Bitzer J, et al (2020) Comparative pharmacokinetic analysis of levonorgestrel-releasing intrauterine systems and levonorgestrel-containing contraceptives with oral or subdermal administration route. The European Journal of Contraception & Reproductive Health Care 25:417–426. https://doi.org/10.1080/13625187.2020...

4. Casper RF (2017) Progestin-only pills may be a better first-line treatment for endometriosis than combined estrogen-progestin contraceptive pills. Fertility and Sterility 107:533–536. https://doi.org/10.1016/j.fertnstert....

5. Vercellini P, Frattaruolo MP, Somigliana E, et al (2013) Surgical versus low-dose progestin treatment for endometriosis-associated severe deep dyspareunia II: Effect on sexual functioning, psychological status and health-related quality of life. Human Reproduction 28:1221–1230. https://doi.org/10.1093/humrep/det041