Drug-Drug Interaction Studies of Levocetirizine with Atenolol
Abstract
The objective of the study was to evaluate the drug-drug interaction studies of levoceterizine with atenolol.Calibration curve studies of working standard solutions of levocetirizine and atenolol (0.01~0.1 mmol) were scanned.Maxima appeared at 231 nm for levocetirizine and 224 nm for atenolol.The calibration curve obeyed Beer Lambert's Law.Lone availabilities of both the drugs were studied in pH 1, pH 4, pH 7.4 and pH 9 at 37 °C on B.P. (British Pharmacopoeia) dissolution apparatus.To study the drug-drug interaction of levocetirizine (5 mg tablet) and atenolol (100 mg tablet), both the drugs were introduced to the dissolution apparatus in simulated gastric juice (pH 1), pH 4, pH 7.4 and pH 9 at 37 °C at zero time and measured the absorbance maxima of both the drugs at the corresponding wavelength.Graphs were plotted for availability percentage (%) of drug versus time at each set of experiment.The availability percentage (%) of levocetirizine in the buffers of pH simulated to gastric pH 4, pH 7.4 and pH 9 in the presence of atenolol was 436.78%, 376.90%, 436.78% and 436.78%, respectively, but the availability of atenolol was increased up to 214.80%, 212.96%, 214.93% and 231.51% in simulated to gastric pH and in the buffers of pH 4, pH 7.4 and pH 9, respectively.On the basis of these studies, it is concluded that levocetirizine forms a charge-complex with atenolol; therefore, co-administration of these drugs should be avoided.
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