Suggest An Alternative For Petogen Injections

Hi im a 24yr old female, my weight is 60 kg my height is 1,7m i dnt have medical history. I have been using petogen since 2009 in june and my problem is that i hav gained so much weight so i didnt go get my may injection now coz i want 2 stop. I want 2 knw should i take anything after stopping or can i jst switch to using the ortho patch.