📋 Indications & Clinical Dosage
*Oral Contraception:*
Females of childbearing potential:1 tablet daily, starting on the first day of menstruation, at the same time, without interruption for 21 days, then 7 tablet free days.
⛔ Contraindications
Pregnancy, jaundice or severe liver disease, benign or malignant liver tumours; which may lead to life threatening intra-abdominal haemorrhage, deep vein thrombosis, pulmonary embolism, heart attack, stroke, angina pectoris; diabetes with blood vessel damage; disturbance of lipometabolism, herpes, deterioration of osteosclerosis during pregnancy, undiagnosed vaginal bleeding; history of migraine accompanied by visual symptoms, speech disability, weakness or numbness, sickle-cell anaemia, pancreatitis.
⚠️ Precautions & Warnings
Diabetes mellitus, hypertension, varicose veins, superficial phlebitis, osteosclerosis, multiple sclerosis, epilepsy, porphyria, Sydenhams chorea, chloasma, heart rhythm/valve disorder, family history of thrombosis; heart attack or stroke and obesity, family history of breast cancer, depression (may get severe), systemic lupus erythematosus, migraine, cigarette smoking, lactation, hyperlipidaemia, gall bladder disease, Crohns disease or ulcerative colitis, haemolytic uraemic syndrome, unusual severe upper abdominal complaints, history of herpes
🔄 Drug Interactions
Antiepileptic drugs (barbiturates, phenylbutazone, hydantoins), anti-TB drugs (rifampicin), ritonavir, antibiotics (penicillins, tetracyclines, griseofulvin) & St. Johns Wort.
⚠️ Adverse Reactions / Side Effects
Headache, migraine, GI upsets, nausea, breast tenderness, pain, enlargement & secretion, changes in body weight & libido, vaginal secretions, depression, contact lens intolerance, various skin reactions, fluid retention, hypersensitivity reactions.
📚 Official Regulatory & Clinical References
- Drug Regulatory Authority of Pakistan (DRAP): Drug Registration, S.R.O. Price Gazettes & National Essential Medicines List (NEML).
- World Health Organization (WHO): Collaborating Centre for Drug Statistics Methodology (ATC/DDD Index).
- Formulary Standards: British National Formulary (BNF) & Pakistan National Formulary (PNF) guidelines.