title: Sustained benefit of tadalafil in patients with pulmonary arterial hypertension with prior response to sildenafil: a case series of 12 patients.
authors.forename: Edgar Lik-Wui
authors.initials: EL
authors.lastname: Tay
authors.forename: Michelle Koh
authors.initials: MK
authors.lastname: Geok-Mui
authors.forename: Margaret Choong
authors.initials: MC
authors.lastname: Poh-Hoon
authors.forename: James
authors.initials: J
authors.lastname: Yip
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002243:Carbolines / Q000493:pharmacokinetics / Q000627:therapeutic use*; D017079:Exercise Tolerance; D005260:Female; D006207:Half-Life; D006801:Humans; D006976:Hypertension, Pulmonary / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D010726:Phosphodiesterase Inhibitors / Q000493:pharmacokinetics / Q000627:therapeutic use*; D010879:Piperazines / Q000493:pharmacokinetics / Q000627:therapeutic use*; D011687:Purines / Q000493:pharmacokinetics / Q000627:therapeutic use; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000493:pharmacokinetics / Q000627:therapeutic use*; D000068581:Tadalafil
chemical_list: D002243:Carbolines; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068581:Tadalafil; D000068677:Sildenafil Citrate