title: [4 years sildenafil: new quality of life for many].
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D007172:Erectile Dysfunction / Q000188:drug therapy* / Q000523:psychology; D005858:Germany; D006801:Humans; D008297:Male; D008875:Middle Aged; D010726:Phosphodiesterase Inhibitors / Q000009:adverse effects / Q000627:therapeutic use*; D010879:Piperazines / Q000009:adverse effects / Q000627:therapeutic use*; D011358:Product Surveillance, Postmarketing; D011687:Purines; D011788:Quality of Life / Q000523:psychology; D016032:Randomized Controlled Trials as Topic; D000068677:Sildenafil Citrate; D013450:Sulfones
chemical_list: D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate