Viagra is available in several strengths, including 25mg, 50mg, and 100mg tablets. The recommended starting dose of Viagra is 50mg, which can be adjusted up or down based on individual response and tolerability.

100mg viagra is the highest strength available and is usually prescribed for those who have not achieved an adequate response to the 50mg dose. However, it is important to note that higher doses of Viagra do not necessarily mean better results. The effectiveness of Viagra varies from person to person and can depend on a variety of factors, including age, underlying health conditions, and medication interactions.

In general, Viagra has been shown to be effective in treating ED in approximately 70% of men. However, it is important to remember that Viagra is not a cure for ED and does not increase sexual desire.