Clomiphene has mainly antiestrogenic effects and some estrogenic effects. The mechanism in stimulating ovulation is unknown but is believed to be related to its antiestrogenic properties. By clomiphene competing with estrogen for binding sites at the hypothalamic level, the gonadotropins, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), secretion is increased, which results in ovarian follicle maturation, followed by the preovulatory LH surge, ovulation, and the subsequent development of the corpus luteum. Usefulness in male infertility is also likely related to the increases in FSH and LH secretion.
Ovulet Tablet 100 mg
The usual dose for the first course of Clomiphene is 50 mg (1 tablet) a day for 5 days in the early follicular phase of the cycle, following normal menstruation or a progestagen-induced withdrawal bleeding. Many regimes have been used, but most common begin either on day 2 or day 5. If this dose induces ovulation, there is no need to increase the dose in the following courses. If this dose induces ovulation, but pregnancy does not occur, stimulation with Clomiphene Citrate is to be continued, but up to 6 stimulative courses. If the first course does not induce ovulation, the second course should be started with 100 mg a day (2 tablets of 50 mg taken in a single dose) for 5 days. If ovulation is not induced, 2 more stimulative courses of the same dose should be given. If the next three stimulative courses do not produce a successful result, the therapeutic trial is considered to be finished. If ovulation is induced, but pregnancy does not occur, maximum 6 courses with Clomiphene are recommended. However, if menstrual bleeding does not occur, the patient should be examined carefully for the possible pregnancy, and the next course of therapy should be delayed until the correct diagnosis has been determined.