Libido Max and Viagra are both formulated to address sexual performance complexity, but they differ frequently in their composition and mechanism of action. Viagra is a prescription medication containing sildenafil, a phosphodiesterase-5 (PDE5) inhibitor, that treats erectile dysfunction by increasing blood flow to the penis. Libido Max, on the other hand, is an over-the-counter supplement marketed for enhancing libido and sexual performance, but its effectiveness is not well-established, and some versions have been found to contain hidden ingredients similar to Viagra.