1. Sildenafil: clinical toxicology profile;Krenzelok;Clin Toxicol.,2000
2. A 4-year update on the safety of sildenafil citrate (Viagra);Padma-Nathan;Urology.,2002
3. Sildenafil citrate: a therapeutic update;Boyce;Clin Ther.,2001
4. The ‘sextasy’ craze. Clubland’s dangerous party mix: Viagra and ecstasy;Breslau;Newsweek,2002
5. The phosphodiesterase type 5 (PDE5) inhibitors for erectile dysfunction;Hussar;Drug Advisor,2003