Shelvik Ct

Uses

Calcium citrate is an ingredient found in a variety of supplements and vitamins.

For use as an over the counter calcium supplement.

Magnesium oxide is a compound commonly used as a laxative for the symptomatic relief of acid indigestion and upset stomach, and in health supplements for cardiovascular and neuromuscular health.

Indicated for over-the-counter use as a supplement for cardiovascular and neuromuscular health, and as an antacid for relief of acid indigestion and upset stomach.

Shelvik Ct is also used to associated treatment for these conditions: Calcium Deficiency, Deficiency of Vitamin D3, Deficiency, Vitamin D, Folate deficiency, Hypocalcemia, Iron Deficiency (ID), OsteoporosisAcid indigestion, Heartburn, Bowel preparation therapy, Nutritional supplementation

How Shelvik Ct works

Calcium citrate increases plasma calcium levels. This reduces calcium flux from osteocyte activity by reducing the secretion of parathyroid hormone (PTH) . Calcium does this by stimulating a G-protein coupled calcium receptor on the surface of parathyroid cells. The reduction in calcium flux increases the amount of calcium deposited in bone resulting in an increase in bone mineral density. The reduction in PTH secretion also reduces the amount of vitamin D metabolized to its active form, calcidiol. Since calcidiol increases the expression of calcium dependent ATPases and transient receptor potential cation channel subfamily V member 6 (TRPV6) both of which are involved in calcium uptake from the gut, a reduction in calcidiol results in less calcium absorption. Additionally, TRPV5, the channel responsible for calcium reabsorption in the kidney, is downregulated when PTH secretion is reduced thus increasing calcium excretion via the kidneys. Another hormone, calitonin, is likely involved in the reduction of bone resorption during periods of high plasma calcium.

The term "Milk of Magnesia" was first used to describe a white aqueous, mildly alkaline suspension of magnesium hydroxide formulated at about 8%w/v. Milk of magnesia is primarily used to alleviate constipation, but can also be used to relieve indigestion and heartburn. When taken internally by mouth as a laxative, the osmotic force of the magnesia suspension acts to draw fluids from the body and to retain those already within the lumen of the intestine, serving to distend the bowel, thus stimulating nerves within the colon wall, inducing peristalsis and resulting in evacuation of colonic contents. Magnesium supplements have also been shown to reduce platelet aggregation by inhibiting in the influx of calcium, a crucial component of platelet aggregation.

Toxicity

Patients taking more than 4g of calcium a day are at risk of hypercalcemia and metabolic alkalosis . Chronic intake of calcium supplements is associated with adverse gastrointestinal symptoms such as constipation and flatulence .

Elimination Route

The percentage of calcium absorbed varies inversely with intake . Tmax of about 3.5-5h varying with formulation .

Elimination Route

Cleared via the kidneys but largely reabsorbed (98-99%) under normal conditions .

Innovators Monograph

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