Zemplar (generic: paricalcitol) is a prescription medication used to treat high levels of the parathyroid hormone (PTH) in those with chronic kidney disease. Zemplar belongs to a group of drugs called vitamin D analogs, which help regulate PTH levels and increase calcium in your body.

This medication comes in tablet form and is taken once a day or 3 times a week, with or without food.

This medication is also available in an injectable form to be given directly into a vein (IV) by a healthcare professional.

Common side effects of Zemplar include diarrhea, hypertension, vomiting, and dizziness. Do not drive or operate heavy machinery until you know how Zemplar affects you.