Zudena 100MG (Udenafil)

Zudena 100MG is Sunrise Remedies's udenafil tablet, 100 mg, in a strip of 4 tablets. Udenafil is a PDE5 inhibitor licensed in South Korea and a few other markets for erectile dysfunction, sold as Zydena.

Udenafil is prescribed for erectile dysfunction. In some countries it is also studied for pulmonary hypertension and for heart conditions in people born with a single functioning ventricle.

Udenafil blocks the PDE5 enzyme that breaks down cyclic GMP in the penis, so blood flows in more easily when there is sexual stimulation. It takes effect in about 30 to 60 minutes and, like tadalafil, acts for many hours.

The usual dose is 100 mg or 200 mg taken about 30 to 60 minutes before sexual activity, not more than once a day, and the starting dose is chosen by the doctor. Follow your prescription and the pack leaflet.

• Headache and flushing.
• Indigestion or heartburn.
• Stuffy or runny nose.
• Dizziness and, less often, low blood pressure.
• Back pain and muscle aches (most often with tadalafil).
• Temporary changes in colour vision or blurred sight (most often with sildenafil and vardenafil).
• An erection lasting more than four hours (priapism) is rare and needs emergency care.
• Sudden loss of vision or hearing is rare and needs immediate medical attention.

Never take it with nitrate medicines (glyceryl trinitrate, isosorbide) or riociguat, because the combined drop in blood pressure can be dangerous. It is not for men whose heart is too weak for sexual activity, after a recent stroke or heart attack, or with severe low blood pressure. Tell your doctor about alpha-blockers, other blood pressure tablets, severe liver or kidney disease, sickle cell disease, retinitis pigmentosa and any penile shape problem. Strong CYP3A4 inhibitors (ritonavir, ketoconazole, clarithromycin) and grapefruit raise the level, so the dose is lowered. These medicines work only with sexual stimulation and do not raise desire. Not for women or children unless prescribed for another condition.