Subsequently, the FDA approved both vardenafil [27] and tadalafil in Medicines that you take by mouth are called oral medicines. Most companies have an FAQ or shipping policy page you can reference to learn whether discreet packaging is available. Tadalafil is also used to treat men who have signs and symptoms of benign prostatic hyperplasia BPH. The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire. Tadalafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension to improve your ability to exercise. Kidney disease that needs to be treated with dialysis.The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). 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. Generic name: tadalafil [ ta-DAL-a-fil ] Brand names: Adcirca, Cialis Drug classes: Agents for pulmonary hypertension, Impotence agents. Cialis is not for use in women. Tadalafil is not approved for use by anyone younger than 18 years old. Tadalafil pregnancy and breastfeeding warnings (more detail). The recommended starting dose for Cialis intended for once daily use is mg, take at the same time each day, without regard to timing of sexual activity. This may be increased to 5mg/day based on need and tolerability. May be taken with or without food. Cialis is available as a generic, under the name tadalafil. 3.