TY - JOUR AU - Muirhead, G J; Allen, M J; James, G C TI - Pharmacokinetics of Sildenafil (Viagra™), a Selective cGMP PDE5 Inhibitor, after Single Oral Doses in Fasted and Fed Healthy Volunteers JO - Brit J Clin Pharmacol VL - 42 PY - 1996 SP - 268P N1 - et al. ER -