Drug-Drug Interaction Between R1_PBK_M2301 and R2_PBK_M2301 in Healthy Adults

R1\_PBK\_M2301 is a test drug containing 60mg of levocloperastine per tablet. It is administered orally to evaluate pharmacokinetic characteristics and potential drug-drug interactions with R2\_PBK\_M2301 in healthy adult volunteers.

R2\_PBK\_M2301 is an oral tablet containing 20 mg of Pelargonium sidoides 11% ethanol extract, used as a comparator to evaluate potential pharmacokinetic interactions with R1\_PBK\_M2301.