ELI5: What would happen to a woman if she consumes viagra?

Many women do, just not for erectile dysfunction. Viagra is the brand name for the drug sildenafil, which acts in the body as a phosphodiesterase 5 (PDE5) inhibitor. Viagra works in males to produce an erection because PDE5 breaks down cyclic GMP, a compound responsible for smooth muscle relaxation.

Female sexual dysfunction - Diagnosis and treatment - Mayo Clinic

Results of studies of women taking these medicines have been mixed. One medicine, sildenafil (Revatio, Viagra), may prove useful for some people who have sexual dysfunction from taking a class of medicines used to treat depression. These are selective serotonin reuptake inhibitors (SSRIs). Don't take sildenafil if you use nitroglycerin for a ...