Generic Cialis tablets may be taken in a variety of different dosage strengths, such as 20mg and others, depending on what your local doctor has prescribed for you. Usually, pills are ingested with water, some 60 minutes before intercourse starts, unless it is a different presentation, like oral jellies or soft tabs. In any case, abide by your local physician's instructions regarding dose and administration. A single dose may be good for up to 30 hours, but the result may vary for different users. Most customers have that long lasting effect in mind when deciding to purchase generic Cialis at Loyal Online Pharmacy, that and its low price, of course.