Both Viagra and Tadalong are used to treat erectile dysfunction in men. However, they contain different active ingredients that belong to the same class of phosphodiesterase-5 (PDE5) inhibitors, but they differ in their duration of action and some other properties. Understanding these differences helps determine which medication is best for each individual.
Viagra Tablet Ingredients
Viagra tablets contain the active ingredient sildenafil. Sildenafil works by increasing blood flow to the penis during sexual stimulation. It does this by inhibiting the PDE5 enzyme, which breaks down cyclic guanosine monophosphate (cGMP), a substance that dilates blood vessels in the penis.
Tadalong Tablet Ingredients
Tadalong tablets contain the active ingredient tadalafil. Tadalafil also works by inhibiting the PDE5 enzyme, which leads to increased blood flow to the penis during sexual stimulation. However, tadalafil has a much longer duration of action than sildenafil.
Information about Viagra tablets
Drug class: Phosphodiesterase-5 (PDE5) inhibitors
Drug classification: Pyrazolopyrimidine derivatives
Dosage form: Tablets
Pharmaceutical family: Urogenital and reproductive system drugs
Active ingredient: Sildenafil
Information about Tadalong tablets
Drug class: Phosphodiesterase-5 (PDE5) inhibitors
Drug class: Pyrazolopyrimidine derivatives
Pharmaceutical form: Tablets
Pharmaceutical family: Urogenital and reproductive system drugs
Active ingredient: Tadalafil
Scientific Degree: Pharmacist
Country: Egypt
Dr. Rawan Mosaad El-Saeed is a clinical pharmacist and medical content reviewer holding a Bachelor of Pharmacy degree from Horus University in Egypt. She has hands-on community pharmacy experience in providing medication therapy counseling, monitoring drug-drug interactions, and ensuring patient adherence to safe usage protocols. She specializes in authoring and fact-checking pharmaceutical guides and simplifying clinical pharmacology based on the latest evidence-based guidelines and internationally accredited references, dedicated to delivering accurate, reliable, and safe healthcare information for readers.
Published Date: 21 April 2025
Source 1 :
Drugs Sildenafil
Source 2 :
Drugs Tadalafil
you should ask your doctor before taking this medicine