Levitra is available for use only on prescription by a doctor. The drug is available in three strengths starting from 5mg, 10 mg and 20mg.
The recommended starting dose for this drug is 10mg that is consumed as an oral medication about an hour before the anticipated sexual activity. This dosage is then adjusted to 20mg or 5mg as required depending on the efficiency of the drug and the tolerance levels of the person.
The dosage recommended is not repeated more than once in 24 hours. Unlike Sildenafil (Viagra), the absorption of this drug is not altered due to the presence of food in the stomach.
Care must be exercised when levitra is being started out in elderly individuals beyond the age of 65, in people suffering from hepatic impairment (liver problems) and people who are on other medications.