Chemical formula: C₂₂H₁₉N₃O₄ Molecular mass: 389.404 g/mol PubChem compound: 110635
Tadalafil is a selective, reversible inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). When sexual stimulation causes the local release of nitric oxide, inhibition of PDE5 by tadalafil produces increased levels of cGMP in the corpus cavernosum. This results in smooth muscle relaxation and inflow of blood into the penile tissues, thereby producing an erection. The effect of PDE5 inhibition on cGMP concentration in the corpus cavernosum is also observed in the smooth muscle of the prostate, the bladder and their vascular supply. The resulting vascular relaxation increases blood perfusion which may be the mechanism by which symptoms of benign prostatic hyperplasia are reduced.
This medicinal substance has been classified in the anatomical therapeutic chemical (ATC) classification according to its main therapeutic use as follows:
| ATC code | Group title | Classification |
|---|---|---|
| G04BE08 | Tadalafil | G Genito urinary system and sex hormones → G04 Urologicals → G04B Other urologicals, incl. antispasmodics → G04BE Drugs used in erectile dysfunction |
Competent medicine agencies globally have authorized commercialization of this active ingredient according to these medication package inserts (MPIs):
| Title | Information Source | Document Type | |
|---|---|---|---|
| CIALIS 2.5 mg Film-coated tablet | European Medicines Agency (EU) | MPI, EU: SmPC | |
| CIALIS 5 mg Film-coated tablet | European Medicines Agency (EU) | MPI, EU: SmPC |
Tadalafil is an active ingredient of these brands:
Ecuador (EC)Finland (FI)Hong Kong (HK)Mexico (MX)Nigeria (NG)Poland (PL)Singapore (SG)Turkey (TR)Note the following: The list of brand names is continuously updated, and thus does not include the total of products circulating worldwide. |
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