Viagra sildenafil is a prescription medication approved for treating erectile dysfunction ED in adult males. A tablet of flibanserin Allen G. Highs and lows in sexual desire may coincide with the beginning or end of a relationship, or major life changes, such as pregnancy or menopause. It can take several weeks to start working. Viagra sildenafil is not approved for use in females.Published on June 28, Medically reviewed by Lindsay Cook, PharmD. Table of Contents. How Does Viagra Work? Does Viagra Work for Women? Side Effects. . Get the facts on Viagra for women, and discover whether the drug is safe for them. Also learn about flibanserin, or Addyi, a Viagra-like drug made specifically for women. . Activity. Relationships. Does Viagra Have an Effect on Women? Can women take it? Effects on women. Dosage. Viagra alternatives for women. Summary. For females, Viagra has mixed.