Category Name Bone & Joint Health — Calcium Supplement + Vitamin D3 Combination (Mineral Supplement + Fat-Soluble Vitamin)
Common Indications Clarical-D3 Tablet is used for the prevention and treatment of calcium and Vitamin D3 deficiency-related conditions, including:
- Osteoporosis (weakening of bones) — prevention and adjunct treatment
- Osteomalacia and rickets (softening of bones due to Vitamin D deficiency)
- Hypocalcemia (low calcium levels in the blood)
- Vitamin D deficiency and insufficiency
- Calcium supplementation during pregnancy and breastfeeding (under medical supervision)
- Support for bone health in postmenopausal women and the elderly
- Adjunct therapy in patients on long-term corticosteroids or anticonvulsants that deplete calcium and Vitamin D
- Muscle weakness and cramps associated with low calcium levels
- Dental health maintenance and support for normal nerve and muscle function
Common Dosing
- Standard Adult Dose: One tablet once or twice daily, with or after meals, or as prescribed by your doctor
- Elemental Calcium Content: Each tablet provides 500 mg of elemental calcium (from 1250 mg Calcium Carbonate) along with 250 IU of Vitamin D3
- Pregnancy and Breastfeeding: Dose as specifically directed by your doctor based on individual requirements
- Elderly Patients: Often require higher supplementation; dose will be guided by serum calcium and Vitamin D levels
- Children: Use only under medical supervision with age-appropriate dosing
Always follow your doctor's prescribed dose and duration. Do not exceed the recommended daily calcium intake without medical advice.
Common Side Effects Clarical-D3 is generally well tolerated at recommended doses. Possible side effects may include:
- Constipation (most common — associated with Calcium Carbonate)
- Bloating and flatulence (gas)
- Nausea or stomach discomfort
- Belching or a chalky taste in the mouth
- Mild headache
Signs of excessive calcium intake (hypercalcemia) — seek medical attention if you experience:
- Persistent nausea, vomiting, or loss of appetite
- Increased thirst and frequent urination
- Muscle weakness or confusion
- Kidney stones (flank pain or blood in urine)
- Irregular heartbeat
Report any persistent or worsening side effects to your doctor promptly.
Common Interactions Inform your doctor or pharmacist about all medications, supplements, and herbal products you are currently taking. Notable interactions include:
- Bisphosphonates (e.g., Alendronate, Risedronate) — Calcium significantly reduces the absorption of bisphosphonates; administer at least 2 hours apart
- Thyroid Medications (e.g., Levothyroxine) — Calcium carbonate may reduce the absorption and effectiveness of thyroid hormone; take at least 4 hours apart
- Tetracycline and Fluoroquinolone Antibiotics (e.g., Doxycycline, Ciprofloxacin) — Calcium forms insoluble complexes with these antibiotics, markedly reducing their absorption; administer at least 2–3 hours apart
- Iron Supplements — Calcium may interfere with iron absorption when taken simultaneously; separate doses by at least 2 hours
- Thiazide Diuretics (e.g., Hydrochlorothiazide) — May reduce urinary calcium excretion, increasing the risk of hypercalcemia when combined with calcium supplements; close monitoring is advised
- Corticosteroids (e.g., Prednisolone) — Long-term use reduces calcium absorption and Vitamin D activity, potentially increasing supplementation requirements
- Cholestyramine and Mineral Oils — May reduce the absorption of fat-soluble Vitamin D3; administer at different times
Special Instructions
| Condition | Guidance |
|---|---|
| 🤰 Pregnancy | Calcium and Vitamin D3 supplementation is generally considered safe and is often recommended during pregnancy to support fetal bone development and prevent maternal bone loss. However, doses should be strictly guided by a doctor to avoid excessive intake, which may be harmful to the developing baby. |
| 🤱 Breastfeeding | Clarical-D3 is generally considered safe during breastfeeding. Calcium and Vitamin D are essential nutrients that support both maternal health and infant bone development through breast milk. Use under medical supervision to ensure appropriate dosing. |
| 🍺 Alcohol | Excessive alcohol consumption should be avoided during supplementation. Chronic alcohol use impairs calcium absorption, reduces Vitamin D activation in the liver, and accelerates bone loss — directly counteracting the benefits of this supplement. |
| 🚗 Driving | Clarical-D3 does not typically affect alertness or the ability to drive at recommended doses. However, if symptoms of hypercalcemia such as confusion or extreme weakness occur, avoid driving and consult your doctor. |
| 🫀 Liver Disease | Use with caution in patients with liver disease. Vitamin D3 requires hepatic conversion to its active form (25-hydroxyvitamin D), and impaired liver function may reduce this conversion, affecting the supplement's effectiveness. Medical supervision and monitoring of Vitamin D levels are recommended. |
| 🫘 Kidney Disease | Use with caution in patients with kidney disease. Impaired kidney function can lead to reduced conversion of Vitamin D to its active form and impaired calcium excretion, increasing the risk of hypercalcemia and kidney stone formation. Dose adjustment and regular monitoring of serum calcium and kidney function are essential. |
Mechanism of Action Clarical-D3 Tablet combines two essential nutrients that work together to maintain and restore calcium balance and support bone health:
Calcium Carbonate (providing 500 mg elemental Calcium): Calcium is the primary mineral component of bone tissue, accounting for approximately 99% of the body's total calcium content. When dietary calcium intake is insufficient, the body draws calcium from bones, weakening them over time. Supplemental calcium directly replenishes the body's calcium pool, supporting bone mineral density, normal nerve transmission, muscle contraction, blood coagulation, and cardiac function. Calcium Carbonate is one of the most concentrated forms of calcium supplement, providing a high yield of elemental calcium per dose and is best absorbed when taken with food (requires gastric acid for optimal absorption)
Vitamin D3 (Cholecalciferol) 250 IU: Vitamin D3 is the natural form of Vitamin D produced by the skin on exposure to sunlight. It undergoes sequential activation — first in the liver (to 25-hydroxyvitamin D) and then in the kidneys (to the active form, 1,25-dihydroxyvitamin D or calcitriol). Active Vitamin D3 plays a critical role in promoting active absorption of calcium and phosphorus from the intestines, reducing urinary calcium loss through the kidneys, and stimulating bone mineralization by facilitating calcium deposition into the bone matrix. Without adequate Vitamin D3, calcium supplementation alone is significantly less effective
Together, they form an essential therapeutic duo — Calcium provides the raw material for bone formation, while Vitamin D3 ensures its optimal absorption, utilization, and deposition into bone tissue.
Instructions to Take
- Take this tablet with or after meals — Calcium Carbonate requires the presence of stomach acid for optimal absorption, making post-meal timing ideal
- Swallow the tablet whole or as directed — some formulations may be chewable; follow the specific instructions on the pack or as advised by your doctor
- If taking two doses daily, space them evenly — morning and evening with meals — for consistent calcium levels throughout the day
- Do not take more than 500–600 mg of elemental calcium at one time, as absorption decreases at higher single doses; split daily doses if a higher total intake is prescribed
- Maintain adequate hydration — drink plenty of water throughout the day to reduce the risk of kidney stones, particularly if you are prone to them
- Separate this supplement from other medications such as antibiotics, thyroid medicines, iron supplements, and bisphosphonates by at least 2–4 hours to avoid absorption interference
- Avoid excessive intake of Vitamin D from multiple sources simultaneously, as Vitamin D toxicity (though rare) can cause hypercalcemia
- If you miss a dose, take it as soon as you remember. If it is almost time for the next dose, skip the missed dose — do not double up
- Store in a cool, dry place away from direct sunlight and moisture. Keep out of reach of children
This information is intended for general reference purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting, changing, or stopping any medication.
