Uses of Viagra
Viagra works by increasing blood flow to the penis, helping a man get and keep an erection. It is used in combination with sexual stimulation. However, it’s important to note that Viagra does not protect against sexually transmitted diseases.

Dosage and Administration
The maximum recommended dosage of Viagra is 100mg once per day3. It should be taken by mouth as directed by a doctor, usually as needed. The medication should be taken at least 30 minutes, but no more than 4 hours, before sexual activity. It is not recommended to take Viagra more than once daily.

Side Effects
Common side effects of Viagra include dizziness, headache, flushing, or stomach upset1. Vision changes such as increased sensitivity to light, blurred vision, or trouble telling blue and green colors apart may also occur. If any of these effects last or get worse, it is advised to consult a doctor or pharmacist promptly.

Precautions
Certain medications can cause unwanted or dangerous effects when used with Viagra. It is important to inform your doctor about all your current medicines, especially riociguat (Adempas) and nitrates2. Viagra should not be taken if you are also using a nitrate drug for chest pain or heart problems.

Conclusion
Viagra is a powerful medication for treating erectile dysfunction. However, it should be used responsibly and under the guidance of a healthcare professional. Always consult your doctor for more information and advice on the use of Viagra 100mg.