Samjin Sildenafil Citrate Tablet 20 mg

Adult dosage

The recommended adult dose (18 years and older) is 20 mg (as sildenafil) taken three times a day. It should be taken at intervals of 4 to 6 hours, regardless of food. For elderly patients (65 years and older), the dose should be determined considering liver function, kidney function, heart function, accompanying diseases, and medications being taken. For patients with renal impairment (including severe renal impairment), dose adjustments are generally not necessary, but in cases of poor tolerability, the dosage may be adjusted to 20 mg twice a day.

This medication acts to dilate blood vessels and may temporarily lower blood pressure. Therefore, patients must inform their doctor if they are taking other medications that lower blood pressure, such as nitrates or nitric oxide donors, before taking this medication. Patients with cardiovascular diseases or a history of recent myocardial infarction, stroke, or life-threatening arrhythmias should consult a doctor before taking this drug. Caution is needed in patients with hypotension or uncontrolled hypertension as taking this medication may be risky. Additionally, it is advisable for patients with certain hereditary retinal diseases or specific heart valve diseases to avoid taking this medication. When taken in conjunction with certain HIV treatments like ritonavir, this drug's concentration in the blood can significantly increase, elevating the risk of side effects, so special caution is needed for patients taking such medications. Elderly patients aged 65 and older and patients with severely impaired liver or kidney function should consider the potential for increased concentration in the blood when taking this medication. If sudden vision loss or hearing loss occurs while taking this medication, patients should immediately consult healthcare professionals, and caution is warranted when combined with other medications that affect blood pressure, such as alpha-blockers, as symptoms of hypotension may present. Pregnant or nursing women are advised not to take this medication. Finally, this medication has been reported to increase mortality in children when used for long periods; thus, it is generally not safe to administer except in special cases.

Serious side effects

Death due to cardiovascular adverse reactions, severe blood pressure drop, severe arrhythmias, cerebrovascular hemorrhage, transient ischemic attack, vision impairment or loss due to non-arteritic anterior ischemic optic neuropathy (NAION), sudden hearing loss or deafness, symptomatic hypotension, orthostatic hypotension, worsening of cardiovascular disease in patients with pulmonary vein obstruction disease, severe liver failure, hypotension, hypertension, life-threatening arrhythmias, heart failure, unstable angina.

Mild side effects

• Headache
• flushing
• dyspepsia
• back pain
• diarrhea
• limb pain
• insomnia
• blurred vision
• cough
• fever

This medication should be stored in a tightly closed container to protect it from air and moisture. It is recommended to maintain the storage temperature between 1°C and 30°C at room temperature.

Appearance

White round film-coated tablets

Package unit

90 tablets per bottle