AIM: To study the pharmacokinetics and relative bioavailability of the domestic and imported calcium folinate tablets in 12 healthy volunteers. METHODS: According to the crossover design, each volunteer was orally given calcium folinate tablets (105 mg, 15 mg/tab×7). The plasma samples were extracted by solid phase, and the drug concentrations in plasma were determined by reversed phase high performance liquid chromatography. RESULTS: The pharmacokinetic parameters of the domestic and imported tablets wer...