Coralex D500 mg+200 IU

Coralex D 500 mg+200 IU is a calcium and vitamin D3 combination supplement (calcium carbonate derived from a coral/marine source, combined with cholecalciferol) used for the following indications:

• Established/guideline-supported uses: Prevention and treatment of calcium and vitamin D deficiency; prevention and adjunctive treatment of osteoporosis (including postmenopausal and steroid-induced osteoporosis) and its associated fracture risk, generally alongside diet and lifestyle measures or other anti-osteoporotic therapy; treatment of osteomalacia and rickets due to inadequate calcium/vitamin D intake.
• Adjunct/supplemental uses: Supplementation during periods of increased calcium demand, including pregnancy, lactation, growth in children and adolescents, and old age; adjunct in the management of hypoparathyroidism-related tetany and hypocalcemia under medical supervision; use as a phosphate binder to help manage hyperphosphatemia in chronic kidney disease, and as a supportive measure in some cases of pancreatitis, always under physician guidance.

Note: Coralex D 500 mg+200 IU is a calcium carbonate source; claims that coral-derived calcium has superior absorption or therapeutic benefit compared with standard calcium carbonate are not well supported by robust clinical evidence, and it should be regarded as a conventional calcium carbonate/vitamin D3 supplement rather than a uniquely superior formulation.

Each dosage unit of Coralex D 500 mg+200 IU typically contains calcium carbonate derived from a coral (marine) source, standardized to provide a defined amount of elemental calcium (commonly 500 mg or 600 mg elemental calcium per unit in marketed formulations), together with vitamin D3 (cholecalciferol), commonly 200 IU or 400 IU. Strengths and the tablet/effervescent-tablet form vary by manufacturer and market; always check the specific product label for exact elemental calcium and vitamin D3 content.

Coralex D 500 mg+200 IU is an oral mineral-vitamin combination supplement. The calcium component is calcium carbonate sourced from fossilized coral (a marine-derived form of calcium carbonate), while the vitamin D3 component is cholecalciferol. Calcium is essential for bone mineralization, nerve conduction, muscle contraction, and blood clotting, while vitamin D3 promotes intestinal absorption of calcium and phosphate and supports normal bone mineralization. Coralex D 500 mg+200 IU is used to correct or prevent calcium and vitamin D insufficiency and as part of the overall management of metabolic bone disorders such as osteoporosis and osteomalacia.

Coralex D 500 mg+200 IU belongs to the therapeutic class of calcium supplements combined with vitamin D3 (calcium and vitamin D combination preparations), used in the prevention and treatment of calcium/vitamin D deficiency and metabolic bone disease.

The calcium in Coralex D 500 mg+200 IU is absorbed mainly in the small intestine through both active vitamin D-dependent transport and passive diffusion, and is essential for normal function of nerves, muscles, and the skeletal system, as well as for blood coagulation. Vitamin D3 (cholecalciferol) is hydroxylated in the liver and kidney to its active metabolite, calcitriol, which increases intestinal absorption of calcium and phosphate, promotes renal tubular reabsorption of calcium, and works with parathyroid hormone to regulate bone mineralization and resorption. Together, the two components of Coralex D 500 mg+200 IU help maintain normal serum calcium levels and support bone mineral density. Coral-sourced calcium carbonate is chemically similar to other forms of calcium carbonate; while it has been marketed on the basis of its similarity to bone mineral structure, controlled clinical evidence does not establish superior absorption or efficacy over conventional calcium carbonate.

Coralex D 500 mg+200 IU tablets should be taken orally with a full glass of water, preferably with or immediately after meals to improve absorption and minimize stomach upset. Effervescent tablets must be fully dissolved in water before drinking. If more than one calcium-containing product or other interacting medication is being taken, doses should be separated in time as advised by a physician or pharmacist (see Interactions).

Coralex D 500 mg+200 IU has the following clinically significant interactions:

• Tetracycline and fluoroquinolone antibiotics: Calcium forms insoluble complexes with these antibiotics, reducing their absorption; separate administration by at least 2 hours before or 4-6 hours after taking Coralex D 500 mg+200 IU.
• Levothyroxine and bisphosphonates: Calcium reduces absorption of these drugs; administer levothyroxine or oral bisphosphonates at least 3-4 hours apart from Coralex D 500 mg+200 IU.
• Thiazide diuretics: Reduce urinary calcium excretion and may increase the risk of hypercalcemia when combined with Coralex D 500 mg+200 IU; monitor serum calcium.
• Cardiac glycosides (e.g., digoxin): Hypercalcemia arising from Coralex D 500 mg+200 IU may potentiate digoxin toxicity and precipitate cardiac arrhythmias; careful clinical and ECG monitoring is advised with concurrent use.
• Systemic corticosteroids: May reduce calcium absorption, potentially requiring dose adjustment of Coralex D 500 mg+200 IU.
• Oxalate- and phytate-rich foods (e.g., spinach, rhubarb, whole bran cereals): May reduce calcium absorption; avoid taking these foods within about 2 hours of Coralex D 500 mg+200 IU.
• Other vitamin D-containing products: Concurrent use with other vitamin D supplements or calcium-containing antacids increases the risk of additive hypercalcemia/hypervitaminosis D.

The most common side effects of Coralex D 500 mg+200 IU are gastrointestinal and generally mild:

• Constipation
• Bloating or abdominal distension
• Nausea or mild GI upset
• Flatulence

Less common effects include diarrhea, dry mouth, headache, and drowsiness. Rarely, allergic reactions (skin rash, itching) can occur. With prolonged high-dose use or in predisposed patients, hypercalcemia can develop, presenting with symptoms such as constipation, anorexia, thirst, and, in severe cases, irregular heartbeat (see Overdose Effects and Precautions).

Coralex D 500 mg+200 IU should be used during pregnancy and lactation only if clearly needed, at doses that do not exceed recommended daily calcium and vitamin D intake, and the potential benefit should justify any potential risk; a physician should be consulted before use. Excessive maternal calcium or vitamin D intake during pregnancy has been associated with a risk of fetal hypercalcemia and should be avoided. At recommended supplemental doses used to correct deficiency, Coralex D 500 mg+200 IU has not been shown to be teratogenic. Both calcium and vitamin D pass into breast milk; while use during breastfeeding at recommended doses is generally considered acceptable when there is a genuine calcium/vitamin D deficiency, the total maternal intake (including supplements given directly to the infant) should be taken into account, and a physician should guide dosing.

The following precautions apply to Coralex D 500 mg+200 IU:

• Use with caution in patients with a history of kidney stones, impaired renal function, or sarcoidosis or other granulomatous diseases, which can cause abnormal vitamin D sensitivity and hypercalcemia.
• Periodic monitoring of serum calcium and renal function (serum creatinine) is advisable with long-term use, particularly in elderly patients, those on cardiac glycosides or thiazide diuretics, or those with predisposition to nephrolithiasis.
• Immobilized patients (e.g., those with osteoporosis on prolonged bed rest) are at increased risk of hypercalcemia and should be monitored accordingly.
• Account for the total vitamin D and calcium intake from all sources (diet, other supplements, fortified foods, other medications) to avoid inadvertent excess.
• Reduce the dose or discontinue Coralex D 500 mg+200 IU if signs of hypercalcemia develop.
• See Contraindications for absolute restrictions and Interactions for drugs requiring dose separation or monitoring.

Overdose of Coralex D 500 mg+200 IU can lead to hypervitaminosis D and hypercalcemia. Symptoms may include loss of appetite, excessive thirst, nausea, vomiting, constipation, abdominal pain, muscle weakness, fatigue, confusion or other mental disturbances, increased urination, bone pain, and, in severe or prolonged cases, kidney stones, nephrocalcinosis, cardiac arrhythmias, and irreversible renal or soft-tissue calcification. If an overdose of Coralex D 500 mg+200 IU is suspected, discontinue the product immediately and seek immediate medical attention or contact a poison control center/emergency services; do not attempt specific home treatment. Management is supportive and should be carried out under medical supervision, with monitoring of serum calcium, renal function, and cardiac status as needed.

Store at room temperature (below 30°C), away from light and moisture. Keep out of reach of children.

Pediatric Use

Coralex D 500 mg+200 IU may be used in children for supplementation of calcium/vitamin D deficiency, rickets, or inadequate dietary intake, with the dose adjusted according to age, weight, and the child's baseline calcium/vitamin D status; a pediatrician should determine the appropriate dose and formulation for young children.

Elderly

Elderly patients, particularly those with reduced renal function or those taking cardiac glycosides or diuretics, should use Coralex D 500 mg+200 IU under closer medical supervision, with periodic monitoring of serum calcium and renal function.

Renal Impairment

Patients with severe renal insufficiency should avoid Coralex D 500 mg+200 IU due to impaired vitamin D metabolism and increased risk of hypercalcemia and soft-tissue calcification (see Contraindications); patients with mild-to-moderate renal impairment require dose individualization and monitoring.

Hepatic Impairment

No well-established dose adjustment is defined for hepatic impairment; since vitamin D3 requires hepatic hydroxylation for activation, patients with significant liver disease should use Coralex D 500 mg+200 IU cautiously and under medical supervision.

The duration of treatment with Coralex D 500 mg+200 IU depends on the indication: short-term supplementation may be adequate for correcting mild dietary insufficiency, while long-term or ongoing use (often months to years) is typical for osteoporosis prevention/management or chronic deficiency states. Duration should be determined by the treating physician based on periodic assessment of calcium/vitamin D status, bone health, and renal function.

Coralex D 500 mg+200 IU belongs to the drug class of calcium supplements in fixed combination with vitamin D3 (calcium and vitamin D3 combination products).

Coralex D 500 mg+200 IU works through two complementary mechanisms: the calcium component provides elemental calcium that is absorbed in the intestine to maintain serum calcium levels needed for bone mineralization, nerve transmission, and muscle contraction, while the vitamin D3 component is converted in the liver and kidney to calcitriol, the active hormone that increases intestinal absorption of calcium and phosphate and regulates calcium homeostasis together with parathyroid hormone.

In children, Coralex D 500 mg+200 IU is used for prevention and treatment of calcium and vitamin D deficiency, including nutritional rickets, when dietary intake or sunlight exposure is inadequate, with dosing individualized by age, weight, and severity of deficiency under pediatric medical supervision. Safety and efficacy of specific fixed-dose combination strengths of Coralex D 500 mg+200 IU have not been separately established for very young infants, and a pediatrician should select an appropriate age-specific calcium/vitamin D product and dose for infants and young children.