DEAR DR. ROACH: I’m a 66-year-old male in good health. I’ve always had very regular bowel movements, usually spending less than 5 minutes in the bathroom daily. About six months ago, I had a colonoscopy. Since then, I’ve been constipated with very hard stools. My doctor recommended fiber suppl ements three times a day and Colace. I’ve been doing this for four months without relief. My diet hasn’t changed in the past year. I drink more than the recommended amount of water and exercise daily. What can I do to get back to normal? -- B.L. ...read more read less