Cialis is an effective, reversible, selective inhibitor of phosphodiesterase type 5 (PDE 5) specific to cyclic guanosine monophosphate (cGMP). When sexual stimulation causes local release of nitric oxide, inhibition of PDE 5 by Cialis leads to increase of cGMP levels in the cavernous body of penis.
IMPORTANT NOTICE: The Bitcoin network is very congested. If you do not pay sufficient transaction fees, your payment will confirm days later and your order will be delayed. If paying by BTC, please ensure you change your wallet settings and pay at least 0.001 BTC to the network to avoid this.