Almond shaped yellow tablet imprinted C20 is 20 mg
Cialis (tadalafil), a drug used to treat erectile dysfunction.
More info:
http://www.cialis.com/ and
http://cialis.drugs.com/
I'm not a pharmacist or a medical doctor. This message is not medical advice nor is it an offer to provide medical advice. All drug identifications should be validated by a licensed MD or pharmacist.