The review focuses on the pharmacokinetics and bioavailability studies for creating new original drugs peptide structure. Much attention is paid to methods for the quantitative determination of peptide compounds in biological material, the study of their pharmacokinetic characteristics, factors that affect the bioavailability of these substances, as well as provide some pharmacokinetic data embedded in the practice of medicines peptide structure.

At present, Russia has developed domestic analogue of Memantine Akatinol — Memaneyrin in the form of droplets which is pharmaceutically equivalent drug memantine Akatinol. The aim of this study was to investigate the bioequivalence of the two formulations of memantine: Memaneyrin (drops, 10 mg) and Akatinol memantine (drops, 10 mg). Bioequivalence assessment was carried out by determining the concentration of memantine in plasma of volunteers, which was determined by HPLC with mass spectrometric detection.

Within the cross, a single, open, randomized study with a two-week washout period, the two sequences has been studied bioequivalence of tablet forms two pioglitazone 18 volunteers (30 mg dosage). Plasma samples were analyzed by a validated HPLC-MS/MS within 48 hours. Analyzed for drugs following pharmacokinetic parameters were calculated: AUC_0-t, C_max, t_max, C_max /AUC. 90% confidence interval for log-transformed values of AUC_0-t was 0.945 — 1.066 and C_max — 0,871 — 1,044. The study concluded that bioequivalence compared pioglitazone drugs.

Under cross, single, open, randomized trial with 1 week washout period, with two sequences of 18 volunteers studied bioequivalence coated tablets, two manufacturers of lisinopril (20 mg dose). The concentration of lisinopril in the plasma samples was determined using HPLC with fluorimetric detection within 72 hours for the investigated preparations the following pharmacokinetic parameters were calculated:AUC_0-∞, C_max, t_max, C_max/AUC. 90% confidence interval relations AUC_0-∞ compared drugs totaled 0.8520 — 1.2102 for C_max — 0,9288 — 1,1451. In addition to the 90% confidence intervals, analysis of variance revealed no statistically significant differences between the studied drugs. Concluded bioequivalence compared drugs lisinopril.

On mongrel male rats studied pharmacokinetics of rifabutin in liposomal form, the relative bioavailability and tissue distribution after intratracheal administration, evaluated pharmacokinetic linearity. To determine rifabutin in plasma and organs were developed and validated HPLC method with UV detection. In the course of the study established a new linear pharmacokinetics of liposomal form of rifabutin dose range 6.5-26 mg/kg, calculate the main pharmacokinetic parameters found that rifabutin intensively distributed in highly vascularized organs, its content in poorly vascularized organs is much lower. After injection the highest concentration of active substance is observed at the injection site, namely the lungs. Relative bioavailability of rifabutin in liposomal form in this experiment was 522%.