Of the 46 sites found that sold prescription drugs directly to the public, 37 required a prescription or a consultation with the site's online doctor (or both). Consultations consisted of the doctor's review of purchasers' answers to online questionnaires. The 9 sites that required no prescription were all based outside the United States. None of the sites would identify the consulting physicians or their qualifications. One site sold a medication that was not approved for use in the United States. The most commonly available drugs were sildenafil (Viagra, used to treat male impotency) and finasteride (Propecia, used to treat male baldness). Even without shipping costs (which varied from $8 to $25), the drugs were more expensive online than in Philadelphia pharmacies. Online consultation fees were generally about $70; in comparison, the average cost of a visit to a primary care doctor in the Philadelphia area was $60.