ESTROGENS. Estrogens may be administered orally, IM, IV, or intravaginally. Oral estrogens are administered with food or immediately after eating to reduce gastrointestinal upset. When estrogens are given vaginally for atrophic vaginitis, the nurse gives the patient instructions on proper use.
CONTRACEPTIVE HORMONES. The monophasic oral contraceptives are administered on a 21-day regimen, with the first tablet taken on the first Sunday after the menses begins or on the day the menses begin if the menses begin on Sunday. After the 21-day regimen, the next 7 days are skipped, then the cycle is begun again. With the biphasic oral contraceptives, the first phase is 10 days of a smaller dosage of progestin, and the second phase is a larger amount of progestin.
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