Dear A Matin Thanks for posting your query on HCM. I appreciate your concern for your father s chronic constipation with weight loss. For temporary relief of constipation, he may use Lactulose syr or Bisacodyl tablets to taken at bed time. In addition certain life style modifications are beneficial in preventing constipation like Avoiding red meat & refine carbohydrate foods Increase dietary fiber intake (green leafy vegetables and fruits) Plenty of oral fluids but should avoid carbonated sweetened soft drinks Daily walking or light exercise. In view of his chronic constipation and weight loss he should be examined by a surgeon for proper evaluation to find out the causes of constipation like inflammatory bowel disease, diverticulosis, or sometimes even cancer. He may need relevant investigations like colonoscopy or barium enema. Hope this answers your query. Best regards.