ซื้อPHENOTAL 20 MG/5 ML. (phenobarbital 20 mg/5 mL) oral solution, 60 mL bottle (51.99.99.99 -532777),ASIABRON (guaifenesin 30 mg/5 mL + theophylline 50 mg/5 mL) oral solution, 60 mL bottle (51.99.99.99 -639754),GUAIFENESIN SYR. 60 ML. (S60/1367 ) โดยวิธีตกลงราคา