 14. Use of any drug that inhibits or induces hepatic metabolism of drugs within 30 days of planned study drug administration and entire study duration e.g. inducers: barbiturates, carbamazepine, rifampicin, phenytoin, glucocorticoid and omeprazole; inhibitors - SSRI antidepressants, cimetidine, diltiazem, macrolides, nitroimidazoles, sedatives and hypnotics, verapamil, fluoroquinolones and antihistamines; 