Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using calcitriol and call your doctor at once if you have:
dehydration symptoms--feeling very thirsty or hot, being unable to urinate, heavy sweating, or hot and dry skin;
high calcium levels--nausea, vomiting, constipation, increased thirst or urination, muscle weakness, bone pain, confusion, lack of energy, or tired feeling; or
low calcium level--muscle spasms or contractions, numbness or tingly feeling (around your mouth, or in your fingers and toes).
Calcitriol can affect growth in children. Tell your doctor if your child is not growing at a normal rate while using  calcitriol.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Calcitriol side effects (more detail)
