Hello Doctor.I Am Suffering From Stomach Ache As I Consulted

Hello doctor.I am suffering from stomach ache as i consulted an ophthalmologist for my infected and wounded eye he prescribed certain eye drops and levorid tablets for two nights only.From the morning i am suffering severe pain in my stomach feels like burned in inside and loose motion too.What i have to do?Do i have to drop the intake of livorid or any food items or vitamin tablets should be taken.Kindly answer me....