Since she has a severe cough along with pain in the upper right abdomen and a history of ulcer, it is important to choose medicines that are gentle on the stomach. For cough, a mild syrup like dextromethorphan-based cough suppressants may help, along with warm fluids and steam inhalation. For pain, a safer option is Paracetamol, as it is less likely to irritate the stomach compared to other painkillers; avoid medicines like ibuprofen or diclofenac as they can worsen ulcers. She may also need a stomach-protecting medicine like Pantoprazole to reduce acidity and prevent irritation. However, since right-sided abdominal pain can sometimes indicate liver, gallbladder, or ulcer-related issues, it is important to consult a doctor if symptoms persist, worsen, or are associated with fever, vomiting, or severe pain, so the exact cause can be identified and treated properly.