dihydrotachysterol /dīhī′drōtəkis″tərol/ , a rapid-acting form of vitamin D. ▪ INDICATIONS: It is prescribed in the treatment of hypocalcemia resulting from hypoparathyroidism and pseudohypoparathyroidism. ▪ CONTRAINDICATIONS: Hypercalcemia, hypocalcemia with kidney insufficiency, hyperphosphatemia, or known hypersensitivity to this drug or to vitamin D prohibits its use. Caution is advised for lactating mothers. ▪ ADVERSE EFFECTS: The most serious adverse reaction is hypercalcemia. With overdosage, calcification of soft tissues, including those of the heart, or cardiovascular or kidney failure may occur.
