Works by providing the necessary calcium in people with reduced calcium levels.

Calcium Citrate is used to prevent or treat low blood calcium levels in people who do not get enough calcium from their diets. It may be used to treat conditions caused by low calcium levels such as bone loss, weak bones, decreased activity of the parathyroid gland and a certain muscle disease.

•  Nausea/vomiting
•  Loss of appetite
•  Unusual weight loss
•  Mental/mood changes
•  Bone/muscle pain
•  Headache
•  Increased thirst/urination
•  Weakness
•  Unusual tiredness

•  Before taking this medications, tell your doctor or pharmacist if you are allergic to it, or if you have any other allergies.
•  This product should not be used if you have certain medical conditions.
•  Tell your doctor if you are pregnant before using this medication.
•  This medication passes into breast milk. Consult your doctor before breast- feeding.
•  Immediately consult your doctor if your condition worsens.

• Vitamin D (ergocalciferol-D2, cholecalciferol-D3, alfacalcidol) is a fat-soluble vitamin that helps your body absorb calcium and phosphorus. Having the right amount of vitamin D, calcium, and phosphorus is important for building and keeping strong bones.
• Vitamin D is made by the body when skin is exposed to sunlight. Sunscreen, protective clothing, limited exposure to sunlight, dark skin, and age may prevent getting enough vitamin D from the sun. 

• Vitamin D is used to treat and prevent bone disorders (such as rickets, osteomalacia).
• Vitamin D with calcium is used to treat or prevent bone loss (osteoporosis).
• Vitamin D is also used with other medications to treat low levels of calcium or phosphate caused by certain disorders (such as hypoparathyroidism, pseudohypoparathyroidism, familial hypophosphatemia). 
• It may be used in kidney disease to keep calcium levels normal and allow normal bone growth. 
• Vitamin D drops (or other supplements) are given to breast-fed infants because breast milk usually has low levels of vitamin D.

• At normal doses usually has no side effects. 
• Too much vitamin D can cause harmful high calcium levels. Tell your doctor right away if any of these signs of high vitamin D/calcium levels occur: nausea/vomiting, constipation, loss of appetite, increased thirst, increased urination, mental/mood changes, unusual tiredness.

• Before using this medication, tell your doctor or pharmacist your medical history, especially of: high calcium/vitamin D levels (hypercalcemia/hypervitaminosis D), difficulty absorbing nutrition from food (malabsorption syndrome), kidney disease, liver disease.
• Liquid products, chewable tablets, or dissolving tablets may contain sugar and/or aspartame. Liquid products may also contain alcohol. Caution is advised if you have diabetes, liver disease, phenylketonuria (PKU), or any other condition that requires you to limit/avoid these substances in your diet.