Viagra’s active ingredient is Sildenafil. Its chemical structure includes a pyrazolopyrimidine core. This structure facilitates its interaction with phosphodiesterase type 5 (PDE5) enzymes.
Cialis, on the other hand, uses Tadalafil. Tadalafil’s chemical structure features a triazolopyrimidine core, differing significantly from sildenafil. This structural variation impacts its duration of action and other pharmacological properties.
Sildenafil and tadalafil both selectively inhibit PDE5, but their unique structures influence their binding affinity and metabolic pathways. These subtle chemical differences explain the variations in their onset, duration, and side effect profiles.
Understanding these chemical structures helps to appreciate how each drug interacts within the body to produce its therapeutic effect. Consult a medical professional for personalized advice regarding medication.
