Agents

• Sildenafil (Viagra, Revatio) (see Sildenafil, [[Sildenafil]])
• Tadalafil (Adcirca, Cialis) see Tadalafil, [[Tadalafil]])
• Vardenafil (Levitra, Staxyn) (see Vardenafil, [[Vardenafil]])

References

• xxx