I am a 50 year old woman and have been suffering from stomach ache from the last two months. It generally begins after having food and becomes severe. It lasts for 2 to 5 hours and gradually fades away. All endoscopy, colonoscopy, x-ray and ultrasound reports were completely normal. The doctor has said that there is some tenderness in the colon and that the stomach ache is because of some infection. I have been prescribed the following medicines: Hyocimax (SOS) Mebiz SR (5 days, twice a day) O2 tablet (5 days, twice a day) Ultracet tablet (SOS) Despite taking appropriate dose, I have not experienced much relief. All the reports are attached alongwith. Please tell me if there can be some other reason behind it.