Microval (Levonorgestrel)

Levonorgestrel, the active ingredient in Microval, is a progestin (synthetic progestogen) presented as an oral tablet for oral use. It is employed to prevent pregnancy, including as an emergency contraceptive, and is indicated for women of reproductive age seeking hormonal birth control. It is approved in the European Union and is widely used in family planning programs.

GNH USA supplies Microval as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide, providing reliable sourcing, regulatory support and consistent product quality across global markets.

Levonorgestrel acts as a hormonal contraceptive by modulating the progestogenic pathway to prevent pregnancy.

- Emergency contraception: prevents pregnancy when taken shortly after unprotected intercourse. - Prevention of pregnancy: provides ongoing contraceptive protection when used as directed. - Hormonal contraceptive therapy: part of progestin‑only regimens for birth control.

Levonorgestrel may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects: - Nausea: mild to moderate stomach upset. - Headache: transient cranial pain. - Breast tenderness: discomfort or swelling of the breasts. - Irregular bleeding: spotting or changes in menstrual flow. - Fatigue: feeling unusually tired. - Mood changes: irritability or emotional fluctuations.

Serious or Rare Side Effects: - Thromboembolic events: blood clots in veins or arteries. - Severe allergic reaction: rash, swelling, or anaphylaxis. - Liver dysfunction: jaundice or abnormal liver enzymes. - Ectopic pregnancy: implantation outside the uterus if fertilization occurs. - Persistent abdominal pain: may indicate a serious complication.

When prescribing levonorgestrel, clinicians should consider several safety precautions. - Contraindication in pregnancy: avoid use if the patient is known to be pregnant. - Liver disease caution: use with care in patients with severe hepatic impairment. - Hypersensitivity: do not administer to individuals with known allergy to levonorgestrel or excipients. - Thromboembolic risk: assess history of clotting disorders before use. - Limit duration: follow recommended treatment length and avoid repeated emergency dosing. - Store at room temperature: keep in original packaging, protect from moisture and heat.

Levonorgestrel can interact with other medicines, affecting its efficacy or safety.

Major Interactions (Avoid): - Rifampin: induces metabolism, reducing contraceptive effectiveness. - Anticonvulsants (phenytoin, carbamazepine, phenobarbital): increase hepatic clearance, lowering drug levels. - St. John’s wort: herbal inducer that may diminish contraceptive protection.

Moderate Interactions (Monitor Closely): - Antifungal agents (ketoconazole, itraconazole): may increase levonorgestrel concentrations. - Certain antibiotics (rifabutin, griseofulvin): can modestly reduce efficacy. - HIV protease inhibitors (ritonavir): may alter hormone levels. - Hormonal therapies (combined oral contraceptives): assess additive hormonal effects.