Neovel (Desogestrel)

• Desogestrel is employed in hormonal contraception to prevent ovulation and alter cervical mucus.
• Contraception (progestogen‑only pill): Provides effective prevention of pregnancy when taken daily by women of reproductive age.

• Desogestrel acts as a selective progesterone receptor agonist. By binding to progesterone receptors in the hypothalamus and pituitary, it suppresses the luteinizing hormone surge, thereby inhibiting ovulation. It also induces changes in cervical mucus that reduce sperm penetration, contributing to contraceptive efficacy.

Desogestrel may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Nausea: mild stomach upset that usually resolves with continued use.
• Headache: occasional tension‑type headaches.
• Breast tenderness: temporary discomfort in the breast tissue.
• Weight gain: modest increase in body weight.
• Irregular bleeding: spotting or changes in menstrual pattern.
• Mood changes: mild fluctuations in mood.

Serious or Rare Side Effects

• Deep vein thrombosis: formation of blood clots in deep veins.
• Pulmonary embolism: clot migration to lung vessels.
• Severe allergic reaction: rash, swelling, or difficulty breathing.
• Liver dysfunction: abnormal liver enzyme levels.
• Hypertension: elevated blood pressure.

Before prescribing Desogestrel, clinicians should evaluate patient history and risk factors.

• Assess contraindications: history of thromboembolic disorders or clotting disorders.
• Review hepatic function: liver disease may affect drug metabolism.
• Consider smoking status: especially in women over 35 who smoke.
• Avoid use in pregnancy: contraceptive not indicated for pregnant women.
• Store at ambient temperature: keep in the original pack, protect from moisture.

Desogestrel can interact with several medications, altering its effectiveness or safety.

Major Interactions (Avoid)

• Enzyme‑inducing anticonvulsants: carbamazepine, phenytoin, phenobarbital.
• Rifampicin: reduces plasma concentrations of desogestrel.
• St. John’s wort: may decrease contraceptive efficacy.

Moderate Interactions (Monitor Closely)

• Certain antibiotics: tetracycline, doxycycline may slightly reduce effectiveness.
• Antifungals: ketoconazole can increase hormone levels.
• Antiretrovirals: efavirenz may lower desogestrel concentrations.