SIDE EFFECTS: Nausea, headache, constipation, or pain/discomfort at the injection site may occur. If any of these effects persist or worsen, notify your doctor promptly. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: back/bone/joint/muscle pain, dry mouth, metallic taste, vomiting, sleepiness, weakness, loss of appetite, dizziness, eye pain/redness/sensitivity to light, fever, fast/slow/irregular heartbeat, decreased interest in sex, mental/mood changes (e.g., confusion), stomach/abdominal pain, swelling of the ankles/feet/hands (edema), increased thirst, signs of kidney problems (such as change in the amount of urine), weight loss. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any of the following symptoms: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

HOW TO USE: This medication is given by injection into a vein, as directed by your doctor, usually 3 times a week (every other day), or during dialysis, or as directed by your doctor. The dosage is based on your condition and response to therapy. Your doctor will do blood tests to find the best dose for you. If you are giving this medication to yourself at home, learn all preparation and usage instructions from your health care professional. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Learn how to store and discard medical supplies safely. It is very important to follow the diet recommended by your doctor to get the most benefit from this medication and to prevent serious side effects. Do not take other supplements/vitamins (e.g., calcium, vitamin D) unless directed by your doctor.

PRECAUTIONS: Before using calcitriol, tell your doctor or pharmacist if you are allergic to it; or to other vitamin D products; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: high calcium levels (hypercalcemia). Before using this medication, tell your doctor or pharmacist your medical history, especially of: heart problems (e.g., irregular heartbeat, coronary artery disease), kidney disease, kidney stones. Notify your doctor beforehand if you will be having surgery or will be confined to a chair/bed (immobile) for a long time. Being immobile for long periods increases your risk of side effects. Be sure to drink plenty of fluids unless otherwise directed by your doctor. During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. It is unknown if this drug passes into breast milk. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: burosumab, cardiac glycosides (e.g., digoxin, digitalis), magnesium-containing medications (e.g., antacids, milk of magnesia), phosphate binders, vitamins/nutritional supplements (especially calcium and vitamin D). Check the labels on all your prescription and nonprescription/herbal products (e.g., antacids, laxatives, vitamins) because they may contain calcium, magnesium, phosphate, and vitamin D. Ask your pharmacist about using those products safely. Calcitriol is very similar to other forms of vitamin D. Do not use medications containing other forms of vitamin D while using calcitriol.

OVERDOSE: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: irregular heartbeat, severe stomach pain, unusually deep sleep.