Title : Physiologically based pharmacokinetic modeling of altered tizanidine systemic exposure by CYP1A2 modulation: Impact of drug-drug interactions and cigarette consumption.

Pub. Date : 2021 Apr

PMID : 33561738






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1 Physiologically based pharmacokinetic modeling of altered tizanidine systemic exposure by CYP1A2 modulation: Impact of drug-drug interactions and cigarette consumption. tizanidine cytochrome P450 family 1 subfamily A member 2 Homo sapiens
2 Tizanidine is primarily metabolized by CYP1A2 and is considered a sensitive index substrate for this enzyme. tizanidine cytochrome P450 family 1 subfamily A member 2 Homo sapiens
3 The physiologically based pharmacokinetic (PBPK) modeling platform Simcyp was used to evaluate the impact of CYP1A2 modulation on tizanidine exposure through drug-drug interactions (DDIs) and host-dependent habits (cigarette smoking). tizanidine cytochrome P450 family 1 subfamily A member 2 Homo sapiens
4 The model was then used to carry-out DDI simulations to predict alterations in tizanidine systemic exposure when co-administered with various CYP1A2 perpetrators including competitive inhibitors (fluvoxamine, ciprofloxacin), a mechanism-based inhibitor (rofecoxib), and an inducer (rifampin). tizanidine cytochrome P450 family 1 subfamily A member 2 Homo sapiens
5 Under each scenario, the PBPK model was able to capture the observed fold changes in tizanidine Cmax and AUC of tizanidine when coadministered with CYP1A2 inhibitors or inducers. tizanidine cytochrome P450 family 1 subfamily A member 2 Homo sapiens
6 Under each scenario, the PBPK model was able to capture the observed fold changes in tizanidine Cmax and AUC of tizanidine when coadministered with CYP1A2 inhibitors or inducers. tizanidine cytochrome P450 family 1 subfamily A member 2 Homo sapiens