Remember to consult with a healthcare professional before incorporating any new supplements into your routine. Potential Interactions with Medications While L-Arginine offers potential benefits for those struggling with erectile dysfunction, it’s important to exercise caution. By inhibiting PDE5, icariin promotes increased blood flow to the genital area and helps relax smooth muscles in the penis, leading to improved erectile function. Horny goat weed has been traditionally used to treat erectile dysfunction by increasing blood flow to the penis. Vitamin C-Rich Fruits for Sexual Health Vitamin C is not only essential for overall health but also plays a crucial role in supporting sexual health.Cialis lasts up to 36 hours in the body, while Viagra lasts 4–6 hours in the body. Both are taken 30 minutes before sex. Cialis can cause limb pain, while Viagra can cause vision change, rash.  · Viagra comes as an oral tablet that contains the active drug sildenafil. Sildenafil is also available in generic form. Viagra is classified as a phosphodiesterase type 5 (PDE5) inhibitor. Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to.