PGDs have been used to make certain POMs available to the public, under certain circumstances. These drugs include Orlistat (as Xenical) for weight loss in cases of Obesity, Finasteride (as Propecia) for restoration of hair in Male-pattern baldness, Sildenafil (as Viagra) for Erectile dysfunction and Levonorgestrel as Emergency Hormonal Contraception. The supply of Levonelle is different, however, in that it is not a POM, but can be used to provide the drug free of charge.