title: Viagra slows the visual response to flicker.
authors.forename: Andrew
authors.initials: A
authors.lastname: Stockman
authors.forename: Lindsay T
authors.initials: LT
authors.lastname: Sharpe
authors.forename: Adnan
authors.initials: A
authors.lastname: Tufail
authors.forename: Philip D
authors.initials: PD
authors.lastname: Kell
authors.forename: Glen
authors.initials: G
authors.lastname: Jeffery
mesh_terms: D054707:Cyclic Nucleotide Phosphodiesterases, Type 6; D006801:Humans; D010726:Phosphodiesterase Inhibitors / Q000494:pharmacology*; D010727:Phosphoric Diester Hydrolases / Q000187:drug effects*; D010879:Piperazines / Q000494:pharmacology*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D015351:Vision Screening; D014785:Vision, Ocular / Q000187:drug effects*; D014796:Visual Perception / Q000187:drug effects*
chemical_list: D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate; D010727:Phosphoric Diester Hydrolases; D054707:Cyclic Nucleotide Phosphodiesterases, Type 6; C517431:PDE6B protein, human