<s>[INST] My 5 month old had open heart surgery on monday and we were sent home on thursday and she has the worst gas pains. She had her ASD and VSD reparied. She moans and crys and lifts up her little legs . She came home on no pain meds . We were just told to give her tylenol every 4 hours. She is eating and drinking fine . [/INST] Welcome to the ChatDoctorI have gone through your question and understand your concerns. Don't worry. These episodes seem to be due to gastritis associated with painkillers she is receiving along with the post surgery stress. I would recommend you to go down on the frequency of Tylenol to 6 hourly along with an antacid such as Lansoprazole or Di gene. Ensure regular feeds. Hopefully this will help you. I would be happy to help you out in any future health related questions. Take care </s>