Drugs that interfere with vitamin D absorption

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Drugs that interfere with vitamin D absorption

A number of drugs interfere with the absorption or metabolism of vitamin D. Among those that interfere with absorption are the following:

-Antacids
*Check with your doctor before taking vitamin D supplements if you have digestive problems. The problem may be more serious than just a lack of vitamin D.

-Barbiturates

-Carbamazepine

-Cholestyramine

-Colestipol

-Fosphenytoin

-H2 blockers: Tagamet, Pepcid, Axid, Zantac

-Heparin

-Highly Active Antiretroviral Therapy, a combination of three drugs for AIDS

-Isoniazid

-Mineral oil or products containing mineral oil

-Orlistat

-Phenobarbital

-Phenytoin

-Rifampin

-St. John’s wort

-Steroids such as prednisone and cortisol don’t prevent absorption of vitamin D, but they do affect the metabolism of vitamin D so that less active vitamin D is formed.

Source: http://www.amazon.com/Vitamin-Dummies-A ... +d+dummies