Emling S. Viagra is not for use by females. Cialis can be taken daily, providing constant treatment for ED for people who have sex frequently. Sildenafil, which helps relax blood vessels and increases blood flow to the genitals, was originally manufactured in by the pharmaceutical company Pfizer who discovered the unexpected side effect while seeking a treatment for heart-related chest pain. However, the dosage can range from 25— mg. Data shared with Viatris will be aggregated and de-identified; it will be combined with data related to other Savings Offer redemptions and will not identify you Viatris reserves the right to rescind, revoke, or amend this Savings Offer without notice No membership fees.Viagra in Sexual Wellness Top Brands (10) Price when purchased online. $ Promensil Natural Relief For Menopausal Symptoms Tablets – 30 Ea, 6 Pack. Free shipping, arrives in 3+ days. $ Zenofem – 1 Bottle (90 Capsules) Save with. Free shipping, arrives in 2 days.  · 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. 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.