It contains a compound called icariin that acts similarly to prescription medications used for ED. This amino acid may interact with certain medications such as nitrates or antihypertensive drugs. By opting for generic alternatives, individuals can save money without compromising on effectiveness. This can have a positive impact on overall well-being and may indirectly contribute to improved sexual function. Are there any side effects associated with using natural Viagra alternatives? This compound has been found to inhibit an enzyme called phosphodiesterase type 5 PDE5 , which is similar to how prescription medications like Viagra work. Increased Stamina for Better Performance Vitamin B-rich fruits play a vital role in increasing stamina, allowing you to perform better during intimate moments.Both generic Cialis and Viagra are known as phosphodiesterase type 5 (PDE5) inhibitors. They work by increasing blood flow to the penis, resulting in improved erections. When a man is sexually aroused, these medications help relax the blood vessels in the penis, allowing more blood to flow into it. Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is mg. Don’t take sildenafil (Viagra) more than once daily (at any dose). Written by Brian Leonard, PharmD, BCACP, BCGP. Viagra is an effective drug for treating male erectile dysfunction, but it targets sexual performance, not sexual arousal. There is limited evidence that Viagra may be beneficial for women with sexual dysfunction, but the .