Fildena Professional contains sildenafil citrate as its active pharmaceutical ingredient. Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor used primarily to treat erectile dysfunction (ED) in men. Chemically, sildenafil citrate is the citrate salt of sildenafil, a compound with the molecular formula C22H30N6O4S for the base, and C28H38N6O11S for the citrate salt.
The IUPAC name of sildenafil is:
1-[[3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine citrate
Its structure consists of several key components:
A pyrazolo[4,3-d]pyrimidine ring (the core structure responsible for PDE5 inhibition)
A sulfonyl group linking the phenyl and piperazine rings
A piperazine ring for enhancing solubility and receptor binding
A citrate group, forming a salt to increase the drug’s stability and absorption
The citrate salt improves bioavailability, making sildenafil more effective in sublingual formulations like FILDENA PROFESSIONAL, which dissolves under the tongue for faster onset.
In summary, the chemical structure of sildenafil in Fildena Professional is a complex heterocyclic molecule with functional groups that enable selective PDE5 inhibition, leading to increased blood flow to the penis during sexual stimulation.
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