Vitamin D
Thera-D is a vitamin D3 (cholecalciferol) supplement used to treat and prevent vitamin D deficiency, which can lead to conditions such as rickets, osteomalacia, and contribute to osteoporosis. It is commonly prescribed when dietary intake or sun exposure is insufficient to maintain adequate vitamin D levels. This medication helps support bone health and calcium absorption in the body.
Thera-D is a vitamin D supplement used to treat deficiency and support bone health.
Key facts at a glance
- RxNorm
- 1116508
- Generic
- Thera-D
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treatment and prevention of vitamin D deficiency, management of conditions such as rickets and osteomalacia, support for bone health in osteoporosis prevention, and supplementation when dietary intake or sun exposure is inadequate.
Thera-D contains cholecalciferol (vitamin D3), which is converted to calcitriol in the liver and kidneys. Calcitriol acts as an active hormone to enhance intestinal absorption of calcium and phosphorus, supporting bone mineralization and overall calcium homeostasis.
Should be taken as directed by a healthcare provider, with periodic monitoring of vitamin D levels recommended. Excessive intake can lead to vitamin D toxicity (hypervitaminosis D), which may cause hypercalcemia. Patients with kidney disease, hypercalcemia, or certain malabsorption syndromes should use with caution under medical supervision.
Official drug label
WellAlly may earn a referral fee from linked resources at no extra cost to you. Editorial content is never influenced by commercial relationships.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy