<p>Respite produces a profound and long-lasting inhibition of gastric acid secretion. An interaction with a compound whose absorption is pH dependent may occur. Co-administration of rabeprazole sodium with ketoconazole or itraconazole may result in a significant decrease in antifungal plasma levels. Therefore individual patients may need to be monitored to determine if a dosage adjustment is necessary when ketoconazole or itraconazole are taken concomitantly with Respite. No interaction with liquid antacids was observed. The absorption of atazanavir is pH-dependent. Therefore PPIs, including rabeprazole, should not be co-administered with atazanavir.</p>