There is no information on whether shockwaves on burning belly fat can weaken the effect of Naraya Plus birth control pills. I'm afraid that studies to check the relationship have not been conducted. From a pharmaceutical point of view, I can only convey information that in the event of a change in body weight, there may be a need to adjust the dose of hormones - to be agreed with the gynecologist: https://www.gdziepolek.pl/telekonsultacja I also enclose additional information about the drug Naraya Plus - prescription preparations can be booked at GdziePoLek and picked up stationary upon presentation of a prescription: https://www.gdziepolek.pl/produkty/51551/naraya-plus-tabletki-powlekane/apteki