ArticleCPT: pharmacometrics & systems pharmacology2026
A Physiologically Based Pharmacokinetic Model to Predict Potential Drug-Drug Interactions of TPN171, a Novel Phosphodiesterase Type 5 Inhibitor.
Article in CPT: pharmacometrics & systems pharmacology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
TPN171 is a potent phosphodiesterase type 5 inhibitor used to treat pulmonary arterial hypertension and erectile dysfunction, primarily metabolized by CYP3A4. This study aimed to evaluate its drug-drug interaction (DDI) potential and determine the optimal dosing when co-administered with CYP3A4 modulators. A physiologically based pharmacokinetic (PBPK) model was developed and validated using clinical DDI data for itraconazole (strong CYP3A4 inhibitor) and rifampin (strong CYP3A4 inducer). The model was then applied to predict DDIs with moderate (diltiazem, fluconazole) and mild (fluvoxamine) inhibitors, as well as moderate (efavirenz) and mild (zanubrutinib) inducers. Predicted AUC
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