You can usually stack L‑citrulline and L‑arginine with VigRX Plus to help blood flow and firmer erections, but start low and watch how you feel. Try a small dose first and check your blood pressure. Do you get lightheaded or dizzy? Stop and call your doctor. People on blood pressure meds, nitrates, blood thinners, or with heart or kidney problems should not try this without … [Read more...] about L-Citrulline/Arginine With Vigrx Plus: Safe Stack