title: Sildenafil (Viagra) a cause of proliferative diabetic retinopathy?
authors: A J
authors: AJ
authors: Burton
authors: A
authors: A
authors: Reynolds
authors: D
authors: D
authors: O'Neill
mesh_terms: D003922:Diabetes Mellitus, Type 1 / Q000150:complications; D003930:Diabetic Retinopathy / Q000139:chemically induced*; D007172:Erectile Dysfunction / Q000188:drug therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010726:Phosphodiesterase Inhibitors / Q000009:adverse effects*; D010879:Piperazines / Q000009:adverse effects*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones
chemical_list: D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate