Tadalafil is a small-molecule research product rather than a peptide.
Also known as tadalafil
Current picks · Nov 14, 2026
Up to three of the lowest effective prices per exact product among vendors that passed the trust floor, were in stock and checked within 72 hours, and have a COA on file for that product and strength tested within 12 months. Affiliate relationships never affect picks or their order.
No offer meets every pick rule today. The exact-product comparisons below still list every recorded price.
Same format. Same amount.
0 of 0 exact products have at least one pick. Vendor counts reflect the current price observations.
Vendor profiles and catalog information are still available below.
What it is
Tadalafil is a pyrazinopyridoindole that is 2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione substituted at position 2 by a methyl group and at position 6 by a 1,3-benzodioxol-5-yl group (the 6R,12aR-diastereomer). A phosphodiesterase V inhibitor inhibitor, currently marketed in pill form for treating erectile dysfunction under the name Cialis; and under the name Adcirca for the treatment of pulmonary arterial hypertension. It has a role as a vasodilator agent and an EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitor. It is a member of benzodioxoles and a pyrazinopyridoindole. The listed molecular formula is C22H19N3O4. PepGrades separately preserves the catalog category because a chemical identity record does not establish a use, outcome, or product quality.
This label describes the available research record, not whether the compound is safe or effective for an individual.
Research context
5 registered studies were found under this name in the current review. Each study still needs to be checked for the exact compound identity, population, endpoints, and results.
Search indexed research for this compound ↗Market context
Tadalafil is commonly sold or discussed for a range of compound-specific research goals. That describes market demand, not proof that the compound is safe or effective.
Market demand and online discussion do not establish product quality, safety, or effectiveness.Vendor directory
Grades describe the vendor record overall, not a test of every product. Lowest prices are effective single-package prices across formats; open a comparison for the exact product.
No vendor has a current Tadalafil offer on record.
3 tracked vendors list Tadalafil without a current offer: Coffee and Peppers (Grade B), Next Chems (Not graded), Peptides For Sale (Not graded).
Sources and review
Last editorial review: Aug 30, 2026. Sources support the compound guide only and do not affect vendor grades.