Sildenafil is also available through Rex MD for $2 per 20-mg dose or $6 per 50- or 100-mg dose. Shipping is free on all online prescriptions. Rex MD is an online prescription service for ED ...

But a generic version (and the active ingredient) of this popular medication, sildenafil, is widely available from several drug manufacturers at a fraction of the cost. Here’s more about this ...

Sildenafil citrate and other PDE5 inhibitors like Cialis ... your healthcare provider will prescribe sildenafil at a starting ...

Sildenafil citrate is a selective and potent inhibitor of phosphodiesterase type 5 (PDE5). PDE5 is a cyclic guanosine monophosphate (cGMP) specific degrading enzyme that is highly present in the ...