You can take it in a small dose daily or in a larger dose as needed. Common ones include: Flushing of the skin. Embracing the Future with Cialis The transformative power of Cialis extends far beyond its traditional uses. This leads to more blood flow to the penis, leading to stronger erections. Shipping: Discreet, fast shipping is a must. Regular and prescribed consumption can lead to improved blood flow, benefiting the heart in more ways than one. Talk with your healthcare provider about which might be best for you.Lemonaid Sildenafil Skip to review Best for bulk ordering Viagra and generic Viagra: Optum Store Viagra Best subscription service for Viagra and generic Viagra: Rex MD Viagra. Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes muscles in the penis, called nitric oxide. This boosts blood flow and helps you get an erection from sexual activity. Here’s our process. How we vet brands and products Erectile dysfunction medications, including Viagra and Cialis, help the muscles in the penis relax so you can get and maintain an erection.