≥99% HPLCMS ConfirmedJanoshik COADomestic USA Shipping
Tadalafil (Cialis) Research — Oregon
Tadalafil (Cialis) is a PDE5 inhibitor / cGMP phosphodiesterase inhibitor researched for Erectile Function / Vascular Research, Pulmonary Arterial Hypertension Research, Benign Prostatic Hyperplasia Research. QSC ships Tadalafil domestically to Oregon with Janoshik third-party COA verification.
Tadalafil selectively inhibits phosphodiesterase type 5 (PDE5), the enzyme responsible for degrading cyclic GMP (cGMP) in vascular smooth muscle. Elevated cGMP activates protein kinase G, causing smooth muscle relaxation and vasodilation in penile corpora cavernosa, pulmonary vasculature, and other PDE5-expressing tissues. The longer half-life (~17.5h) vs sildenafil (~4h) allow… Full Tadalafil Research Hub →
QSC Shipping to Oregon
Domestic USA fulfilment — orders to Oregon ship 3–5 business days. Sealed, temperature-appropriate, discrete packaging with Janoshik COA included.
