Pregnancy interaction: Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks.

Side Effects: Dry mouth, muscle pain, increased thirst, loss of appetite, vomiting, metallic taste, upset stomach, constipation, difficult urination.

How to use: PO- The recommended initial dose is 1 mcg (0.02 mcgkg) to 2 mcg administered three times weekly, approximately every other day. It comes as a tablet and capsule to take by mouth, with or without food.

How it works: It works by helping the body to use more of the calcium found in foods and supplements.