Drink plenty of water. Constipation is sometimes the result of simply not drinking enough water.
Consider probiotics
Probiotics reintroduce friendly bacteria into your colon. If you've recently taken antibiotics, much of the good and all the bad bacteria was destroyed. A 6 to 8 week regimen should help re-establish this vital intestinal flora; and you may continue using it as part of a general health program! It is available in both powder and capsule form.
Take alfalfa
Start with 3 or 4 tablets and increase to 6 to 10, then take that amount twice a day. The optimal dosage may be 20 to 30 tablets taken throughout the day, until your bowels are regular; then cut back to 3 or 4 tablets daily. It's known as nature's "broom and deodorizer," and is an excellent source of fiber, chlorophyll and trace minerals (besides being a very nutritious food).
Consume 25 to 35 grams of fiber a day
Psyllium for example, is very popular. It absorbs water and carries extra moisture through your bowels making a softer stool.
Use laxatives infrequently
Many people rely on cascara sagrada and senna for chronic constipation. These herbs increase the intestinal movement and promote a strong laxative effect. Be sure to replenish your fluid levels since laxatives can cause a rapid loss of electrolytes.