Generic Name: tadalafil
Pill imprint C 20 has been identified as Cialis 20 mg.
Cialis is used in the treatment of erectile dysfunction and belongs to the drug class impotence agents. There is no proven risk in humans during pregnancy.
Cialis 20 mg is not subject to the Controlled Substances Act.
You could view the pill: https://www.drugs.com/imprints/c-20-1510.html
Best wishes, take care, please.
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