Why is my wife having abdominal pain, nausea and dyspepsia?

Your wife may have hyperacidity/reflux or maybe colitis. In case symptoms are persistent or associated with any black/red colored stools, weight loss or difficulty in swallowing, she should be investigated including haemogram, stool routine and occult blood x 3 samples, sgot, alkaline phosphatase, USG abdomen. Meanwhile complete the current course of medication for 5-7 days and then stop.A proton pump inhibitor like pantoprazole or rabeprazole maybe more effective in controlling dyspepsia. The only link with chikungunya after so many months could be if your wife is on painkillers.Avoid self medication and please do consult a doctor if needed.