Cobra 120 mg is an oral tablet containing Sildenafil Citrate (120 mg) as its active pharmaceutical ingredient. It belongs to a class of medications known as phosphodiesterase type 5 (PDE5) inhibitors and is primarily used to treat erectile dysfunction (ED) in adult men. Key DetailsMechanism of Action: It works by relaxing the smooth muscles and blood vessels in the penis, which significantly increases blood flow during sexual stimulation, helping to achieve and maintain a firm erection. Sexual arousal is still required for the medication to work. Onset and Duration: It is typically taken about 30 to 60 minutes before planned sexual activity. Its effects generally last between 4 to 6 hours. It should not be taken more than once a day. Dosage Note: 120 mg is a higher dosage than the standard starting doses typically prescribed for Sildenafil (which usually range from 25 mg to 100 mg). Dosage choices should always be evaluated and monitored by a healthcare professional based on individual tolerance and health history.Common Side EffectsMild headache or facial flushingIndigestion or stomach upset Nasal congestion or a stuffy nose Dizziness or mild visual changes (such as a slight blue tint or blurred vision) Important Safety WarningsNitrate Contraindication: Never take Cobra or any Sildenafil product if you take nitrate medications (such as nitroglycerin for chest pain) or recreational drugs known as “poppers“. The combination can cause a sudden, severe, and potentially fatal drop in blood pressure. Cardiovascular Health: Because sexual activity places an extra strain on the heart, you should consult a doctor to ensure your cardiovascular system is healthy enough for it, especially if you have a history of heart attack, stroke, or severe high/low blood pressure. Prolonged Erection (Priapism): If an erection lasts longer than 4 hours continuously, seek immediate medical attention, as prolonged lack of blood flow can permanently damage penile tissue. Are you looking for information on proper usage guidelines, or did you have a specific question about potential drug interactions