Clomid Side Effects
Generic name: clomiphene
Note: This document contains side effect information about clomiphene. Some of the dosage forms listed on this page may not apply to the brand name Clomid.
Some side effects of Clomid may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.
For the Consumer
Applies to clomiphene: oral tablet
Stop taking clomiphene (the active ingredient contained in Clomid) and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).
The ovarian hyperstimulation syndrome (OHSS) has been reported to occur in patients receiving clomiphene. Symptoms of OHSS include swelling of the hands or legs, abdominal pain and swelling, shortness of breath, weight gain, and nausea or vomiting. OHSS can be fatal. Notify your doctor immediately or seek emergency medical attention if you develop any of these side effects.
Other side effects may also occur. Notify your doctor if you experience
ovarian enlargement presenting as abdominal or pelvic pain, tenderness, pressure, or swelling;
nausea, vomiting, or diarrhea;
breast tenderness or discomfort;
blurred vision or other visual disturbances;
abnormal uterine bleeding.
Clomiphene may increase the likelihood of multiple births. Multiple births may carry additional risk both for the mother and for the fetuses.
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
For Healthcare Professionals
Applies to clomiphene: compounding powder, oral tablet
At recommended dosages, clomiphene (the active ingredient contained in Clomid) is generally well tolerated. Adverse reactions usually are mild, transient, and resolve when clomiphene is discontinued.
Very common (10% or more): Ovarian enlargement, ovarian hyperstimulation syndrome
Common (1% to 10%): Abnormal uterine bleeding (intermenstrual spotting, menorrhagia), multiple pregnancies, spontaneous abortions (ectopic pregnancies, hydatiform moles, fetus papyraceous)
Uncommon (0.1% to 1%): Stillbirths, increased urinary frequency/volume, vaginal dryness, priapism
Frequency not reported: Temporary sterility in males
Postmarketing reports: Endometriosis, ovarian cyst, ovarian hemorrhage, tubal pregnancy, uterine hemorrhage
Male sterility after high dose therapy may be due to hyalinization of the tubular membranes and damage to the spermatids. In general, clomiphene enhances spermatozoal motility and does not change the sperm to abnormal or immature forms.
Common (1% to 10%): Blurred vision, lights, floaters, waves, unspecified visual complaints, photophobia, diplopia, scotomata, phosphenes
Frequency not reported: Scintillations, heat waves, irreversible palinopsia (prolonged afterimages), shimmering of the peripheral field
Postmarketing reports: Abnormal accommodation, cataract, eye pain, macular edema, optic neuritis, photopsia, posterior vitreous detachment, retinal hemorrhage, retinal thrombosis, retinal vascular spasm, temporary or prolonged loss of vision, possibly irreversible
Very common (10% or more): Vasomotor flushes
Postmarketing reports: Arrhythmias, chest pain, edema, hypertension, palpitations, phlebitis, pulmonary embolism, shortness of breath, tachycardia, thrombophlebitis.
Frequency not reported: Gynecomastia, thyroid disorders
Postmarketing reports: Thyroid disorders
Uncommon (0.1% to 1%): Leydig cell tumor of testis (in male treated for oligospermia)
Frequency not reported: Ovarian cancer, increased risk of borderline or invasive ovarian tumor
Postmarketing reports: Hepatic hemangiosarcoma, liver cell adenoma, hepatocellular carcinoma, fibrocystic disease, breast carcinoma, endometrial carcinoma, astrocytoma, pituitary tumor, prolactinoma, neurofibromatosis, glioblastoma multiforme, brain abscess, luteoma of pregnancy, dermoid cyst of the ovary, ovarian carcinoma, hydatiform mole, choriocarcinoma, melanoma, myeloma, perianal cysts, renal cell carcinoma, Hodgkin's lymphoma, tongue carcinoma, bladder carcinoma
Common (1% to 10%): Headache
Uncommon (0.1% to 1%): Dizziness, insomnia, light-headedness, nervous tension, vertigo
Postmarketing reports: Migraine headache, paresthesia, seizure, stroke, syncope
Uncommon (0.1% to 1%): Dermatitis, rash, hair loss, dry hair
Frequency not reported: Reversible alopecia, urticaria, acne, erythema nodosum, erythema multiforme
Postmarketing reports: Acne, allergic reaction, erythema, erythema multiforme, erythema nodosum, hypertrichosis, pruritis, urticaria
Common (1% to 10%): Abdominal-pelvic discomfort/distention/bloating, nausea, vomiting
Uncommon (0.1% to 1%): Acute abdomen, constipation, diarrhea
A 32-year-old woman receiving clomiphene (the active ingredient contained in Clomid) citrate treatment for ovulation induction was admitted for complaints of swelling and pain in her right calf. Her medical history was unremarkable except for complications following an appendectomy three years prior which resulted in a deep vein thrombosis (DVT) and subsequent pulmonary embolism. The patient had been taking clomiphene two days prior to the development of the first DVT. Six months later, the treatment with clomiphene was renewed. The patient developed recurrent DVT following repeated standard clomiphene treatment.
Uncommon (0.1% to 1%): Deep vein thrombosis
Frequency not reported: Pituitary hemorrhage (with undiagnosed pituitary tumor)
Postmarketing reports: Leukocytosis
Postmarketing reports: Increased transaminases, hepatitis
Uncommon (0.1% to 1%): Increased appetite, weight gain/loss
Postmarketing reports: Arthralgia, back pain, myalgia
Common (1% to 10%): Breast discomfort
Uncommon (0.1% to 1%): Fatigue
Frequency not reported: Elevated levels of desmosterol (for prolonged therapy)
Postmarketing reports: Fever, tinnitus, weakness
Fetal/Neonatal Anomalies and Mortality:
Uncommon (0.1% to 1%): Congenital heart lesions, down syndrome, club foot, congenital gut lesions, hypospadias, microcephaly, harelip and cleft palate, congenital hip, hemangioma, undescended testicles, polydactyly, conjoined twins and teratomatous malformation, patent ductus arteriosus, amaurosis, arteriovenous fistula, inguinal hernia, umbilical hernia, syndactyly, pectus excavatum, myopathy, dermoid cyst of scalp, omphalocele, spina bifida occulta, ichthyosis, and persistent lingual frenulum, neonatal death, fetal death/stillbirth
Postmarketing reports: Skeletal malformations of the skull, face, nasal passages, jaw, hand, limb (ectromelia including amelia, hemimelia, and phocomelia), foot (clubfoot), spine, joints; septal heart defects, muscular ventricular septal defect, patent ductus arteriosus, tetralogy of Fallot, coarctation of the aorta; down syndrome; ear abnormalities and deafness; cleft lip and palate, imperforate anus, tracheoesophageal fistula, diaphragmatic hernia, omphalocele; hypospadias, cloacal exstrophy, lung tissue malformations; malformations of the eye and lens (cataract); neuroectodermal tumor, thyroid tumor, hepatoblastoma, lymphocytic leukemia; neural tube defects (anencephaly, meningomyelocele), microcephaly, hydrocephalus; renal agenesis and renal dysgenesis; dwarfism, mental retardation
Uncommon (0.1% to 1%): Depression
Postmarketing reports: Anxiety, irritability, mood changes, psychosis
Uncommon (0.1% to 1%): Pulmonary embolism (in male treated for infertility)
More Clomid resources
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