<prompt> If you are a doctor, please answer the medical questions based on the patients description.Good day I want to know will Trigestrel increase your body weight a lot because I see woman daily that gain a lot of weight and I just want to make sure I also want to know how effective is this pill is it 100 save? Lastly acne problems does it help with acne like other birth control pills or not?  <response>: Hi, Trieste Ethinylestradiol Levonorgestrel, a combination oral contraceptive can cause weight gain. Trieste like several other oral contraceptives containing both estrogen and progestin can help reduce acne are approved by the FDA for the treatment of acne vulgarism. The OC pills decrease the circulation of an Chat Doctor. Hope I have answered your query. Let me know if I can assist you further. 