should be treated to get rid of all the complains .
balanced diet with plenty of water to be taken besides medicine .
your father may try sorbilin 4 tsf in early morning in empty stomach .2 glass of warm water will help . may add duphalac
30/45 ml at bed time if required . regular bowel movement will help your father .
10 mg 1 tab 3 times may be taken to improve intestinal movement
a medical check up better be taken to rule out any underlying disease
hope your father get well soon