<p>Lansoprazole is metabolized through the cytochrome P450 system,specially through the CYP3A and CYP2C19 isozymes.Studies in healthy subjects have shown that Lansoprazole does not have clinically significant interactions with other drugs metabolized by the cytochrome P450 system, such as warfarin, antipyrine, indomethacin, ibuprofen, phenytoin, propranolol, prednisolone, diazepam, clarithromycin or terfenadine.<br />
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Clarithromycin use in patients who are receiving theophylline may be associated with increase of serum theophylline concentrations.<br />
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There have been reports of interactions of erythromycin and/or clarithromycin with carbamazepine, cyclosporine, tacrolimus, hexobarbital, phenytoin, alfetanil, disopyramide, lovastatin, bromocriptine, valproate, terfenadine, cisapride, pimozide &amp; astemizole.</p>