Table 2. Pharmacokinetic parameters of noopept, dilept and their active metabolite M-1 and compound GB-115 in rabbits after a single oral administration of drug substances.

Parameters, units of measurement

Noopept

Dilept

Metabolite М-1

Compound GB-115

Cmax, ng/ml

1070± 74.90

3.10±1.21

4.41±1.91

191.50±39.16

Tmax, h

0.25±0.03

0.79±0.10

0.69±0.30

0.71±0.10

AUC0→, ng/ml×h

700±63.0

4.96±1.91

7.31±2.22

447.59±165

T1/2, h

0.25±0.03

1.13±0.12

1.18±0.49

1.32±0.30

MRT, h

0.63±0.05

1.50±0.13

2.00±0.68

1.65±0.38

Note. Cmax, ng/ml – the peak plasma concentration of a drug after administration, Tmax, h – time to reach Cmax, AUC0→t, ng/ml×h – area under the curve, T1/2, h – elimination half-life – the time required for the concentration of the drug to reach half of its original value, MRT, h – the mean residence time of drugs and their metabolites