INCUBATION OF THE NONSTEROIDAL ANTIESTROGEN CLOMIPHENE WITH RAT LIVER MICROSOMES RESULTED IN THE FORMATION OF THE 4-HYDROXY-, N-DESETHYL-, & N-OXIDE METABOLITES, IN QUALITATIVE CONTRAST TO RESULTS PREVIOUSLY OBTAINED ANALOGOUSLY WITH RABBIT MICROSOMES IN WHICH ONLY THE FIRST 2 METABOLITES WERE DETECTED. ORAL ADMIN OF CLOMIPHENE RESULTED IN NO DETECTABLE URINARY ELIMINATION OF THE DRUG OR ITS METABOLITES. 4-HYDROXYCLOMIPHENE WAS THE SOLE DETECTABLE ELIMINATION PRODUCT IN FECAL EXTRACTIONS.
There is little information on serum aminotransferase levels during clomiphene therapy which is typically given in low doses for a short time only. There have been a few reports of mild serum enzyme elevations in patients taking clomiphene, but no convincing instances of idiosyncratic, clinically apparent liver injury with its use.
Drugs used to treat infertility in women typically act by stimulation of the ovarian follicles which can lead to the ovarian hyperstimulation syndrome (OHSS), which can occasionally be accompanied by serum enzyme elevations and even jaundice. This syndrome typically arises within 4 to 14 days of ovarian stimulation with gonadotropins or clomiphene and is characterized by the onset of abdominal pain and distension with ascites and enlarged ovaries and ovarian cysts. There can be marked fluid shifts with hemoconcentration and rapid onset of severe ascites and pleural effusions. Liver tests are elevated in 25% to 40% of patients with OHSS, typically with mild-to-moderate increases in ALT and AST values, but minimal or no elevations in serum bilirubin and alkaline phosphatase levels. The liver test abnormalities resolve with resolution of the OHSS, usually within 2 to 3 weeks of onset. In severe instances, OHSS can be fatal, but death is usually due to dehydration, shock and septicemia rather than hepatic failure. In typical cases with abnormal liver enzymes, liver histology reveals nonspecific changes of sinusoidal dilatation, mild fat accumulation and focal inflammatory infiltrates with macrophages and lymphocytes. OHSS is less common with clomiphene than with human chorionic gonadotropin (hCG) induction of ovulation.
Likelihood score: C (probable cause of clinically apparent liver injury as a part of the ovarian hyperstimulation syndrome).
Classification of carcinogenicity: 1) evidence in humans: inadequate; 2) evidence in animals: inadequate. Overall summary evaluation of carcinogenic risk to humans is Group 3: The agent is not classifiable as to its carcinogenicity to humans.
◉ Summary of Use during Lactation:Clomiphene appeared in low amounts in milk in one woman. Several studies found that clomiphene suppresses lactation in women who did not want to breastfeed. It appears to act by lowering serum prolactin, especially the post-stimulation surge in serum prolactin. It is likely that clomiphene would interfere with lactation in a nursing mother.
◉ Effects in Breastfed Infants:A woman who was taking clomiphene in a dose of 2.04 mg/kg daily partially breastfed her infant. She did not observe any adverse effects in her infant.
◉ Effects on Lactation and Breastmilk:A double-blind study compared clomiphene in dosages of 50 mg daily for 10 days (n = 110), 100 mg daily for 5 days (n = 26) and placebo (n = 41) in their ability to suppress lactation and relieve pain and engorgement in nonnursing postpartum mothers. Both dosages of clomiphene were superior to placebo as reported by the women, but the 100 mg daily dosage was somewhat superior to the 50 mg daily dosage.
A study compared clomiphene 100 mg daily for 5 days (n = 60) to placebo (n = 30) in suppressing lactation and symptoms of engorgement. Starting clomiphene within 12 hours of delivery was more effective in all measures than starting it 12 hours or more after delivery as judged by a physician observer; both treatments were more effective than mechanical measures alone such as breast binding.
A randomized trial compared clomiphene 50 mg twice daily for 14 days (n = 15) to bromocriptine 2.5 mg twice daily for 14 days (n = 15), diethylstilbestrol 5 mg 3 times daily for 14 days (n = 15), testosterone propionate 75 mg intramuscularly once (n = 15), and placebo 3 times daily by mouth (n = 15) in their ability to reduce serum prolactin and lactation postpartum. After three days of treatment, serum prolactin was reduced to 65% of baseline by clomiphene compared to a drop to 35% in patients who received bromocriptine. Clomiphene was also less effective than bromocriptine in suppressing lactation and symptoms of engorgement.
A study compared clomiphene 100 mg daily for 7 days (n = 10) to placebo (n = 12) started on the first day postpartum. Clomiphene was no more effective than placebo in suppressing lactation or reducing serum prolactin concentrations.
Women in the first week postpartum who did not wish to breastfeed received either clomiphene 50 mg twice daily (n = 10) or placebo (n = 10). Women who received clomiphene did not experience a rise in serum prolactin from baseline values during use of a breast pump; those given placebo had the normal post-stimulation rise in serum prolactin.
Eighty postpartum women were studied. Forty received clomiphene 50 mg twice daily for 5 days beginning the first day postpartum; 20 received clomiphene 50 mg twice daily for 5 days beginning the fourth day postpartum; and, 20 received placebo. All women receiving clomiphene experienced inhibition of lactation, and reductions in breast engorgement, discomfort and serum prolactin. Prolactin serum concentrations became statistically lower than baseline on day 3 for the women who were 1 day postpartum and on day 5 for those who were 4 days postpartum at the outset. Placebo did not suppress lactation nor suppress serum prolactin.
...REPORTED A CASE OF GRANULOSA-CELL TUMOR OF THE OVARY IN A 28-YR OLD FEMALE WHO HAD RECEIVED CLOMIPHENE CITRATE THERAPY FOR TWO CYCLES (2 FIVE-DAY COURSES OF 100 MG PER DAY). TWO CASES OF BILATERAL BREAST CANCER WERE REPORTED IN WOMEN AGED 28 AND 29 WHO HAD RECEIVED SUCH THERAPY. MOLAR PREGNANCIES HAVE BEEN OBSERVED FOLLOWING INDUCTION OF OVULATION BY CLOMIPHENE CITRATE...AND RAPID ENLARGEMENT OF UTERINE FIBROIDS HAS ALSO BEEN REPORTED. /CLOMIPHENE CITRATE/
A 28-YEAR OLD MALE WHO HAD RECEIVED 1 MG 'CISCLOMIPHENE CITRATE' (ENCLOMIPHENE, THE TRANS ISOMER) DAILY FOR 10 WK DEVELOPED A GERM-CELL TUMOR WITH ELEMENTS OF SEMINOMA AND MATURE ADULT TERATOMA. /TRANS- ISOMER OF CLOMIPHENE CITRATE/
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
吸收
基于早期使用14C标记的克罗米芬进行研究,该药物在人体内口服吸收良好。
Based on early studies with 14 C-labeled clomifene, the drug was shown to be readily absorbed orally in humans.
Based on early studies with 14C-labeled clomiphene citrate, the drug was shown to be readily absorbed orally in humans and excreted principally in the feces. Mean urinary excretion was approximately 8% with fecal excretion of about 42%.
SC DOSE OF (14)C CLOMIPHENE CITRATE...WAS DISTRIBUTED IN TISSUES OF FEMALE GUINEA PIG NEONATES... ESTROGENIC-RESPONSIVE TISSUES SHOWED HIGH AFFINITY FOR (14)C. LEVELS OF (14)C...CONSTANT IN UTERUS...THOSE IN OVARIES & PLASMA DECLINED...IN ADRENALS INCR. /CLOMIPHENE CITRATE/
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
大约一半的摄入剂量在五天内被排出;在服用后六周内的粪便中仍可检测到微量./克罗米芬citrate/
ABOUT ONE-HALF OF THE INGESTED DOSE IS EXCRETED IN FIVE DAYS; TRACES APPEAR IN THE FECES UP TO SIX WEEKS AFTER ADMIN. /CLOMIPHENE CITRATE/
Clomiphene is well absorbed following oral administration. The drug and its metabolites are eliminated primarily in the feces and to a lesser extent in the urine. The rather long plasma half-life (approximately 5 to 7 days) is due largely to plasma protein binding, enterophepatic circulation, and accumulation in fatty tissues. Active metabolites with long half-lives also may be produced.
Use of clomiphene to increase bone mass in premenopausal women
申请人:Yale University
公开号:US04970237A1
公开(公告)日:1990-11-13
This invention relates to the use of clomiphene in preventing osteoporosis in humans and treating human patients experiencing osteoporosis.
本发明涉及在人体中使用克罗米芬预防骨质疏松症和治疗患有骨质疏松症的患者。
Al-Hassan, Mohammed I., Synthetic Communications, 1987, vol. 17, # 15, p. 1787 - 1796
作者:Al-Hassan, Mohammed I.
DOI:——
日期:——
CLOMIPHENE SYNTHESIS USING A SINGLE SOLVENT
申请人:REPROS THERAPEUTICS INC.
公开号:US20170073302A1
公开(公告)日:2017-03-16
The present invention provides a one-pot method for synthesizing clomiphene (a mixture of the isomers cis-clomiphene and trans-clomiphene) utilizing a single solvent. In a preferred embodiment, the single solvent is dichloromethane (DCM, also known as methylene chloride). The present invention provides an improved method for synthesizing clomiphene and purifying clomiphene isomers.