Drug Interactions between Prevacid NapraPAC and Sytobex
This report displays the potential drug interactions for the following 2 drugs:
- Prevacid NapraPAC (lansoprazole/naproxen)
- Sytobex (cyanocobalamin)
Interactions between your drugs
naproxen lansoprazole
Applies to: Prevacid NapraPAC (lansoprazole / naproxen) and Prevacid NapraPAC (lansoprazole / naproxen)
GENERALLY AVOID: Theoretically, proton pump inhibitors may decrease the gastrointestinal absorption of enteric-coated naproxen, which requires an acidic environment for dissolution. The proposed mechanism is an increase in gastric pH (i.e. decreased gastric acidity) induced by proton pump inhibitors. In patients treated with proton pump inhibitors, the possibility of a reduced or subtherapeutic response to enteric-coated naproxen should be considered.
MANAGEMENT: Concomitant use of these drugs is generally not recommended.
References
- "Product Information. Naprosyn (naproxen)." Syntex Laboratories Inc PROD (2002):
cyanocobalamin lansoprazole
Applies to: Sytobex (cyanocobalamin) and Prevacid NapraPAC (lansoprazole / naproxen)
By reducing or suppressing gastric acid secretion, H2-receptor antagonists and proton pump inhibitors may interfere with the gastrointestinal absorption of vitamin B12, a process that is dependent on the presence of gastric acid and pepsin. Clinical studies have shown that dietary (i.e., protein-bound) vitamin B12 malabsorption can occur during treatment with these agents, particularly proton pump inhibitors, although the likelihood of developing clinically significant deficiency over time is unknown. There has been one reported case of vitamin B12 deficiency with megaloblastic anemia in a patient who received omeprazole at a minimum of 40 mg/day for 4 years. Also uncertain is whether acid reduction or suppression can affect the absorption of vitamin B12 ingested in the form of oral supplements such as cyanocobalamin. Non-oral routes of administration (e.g., parenteral, intranasal, sublingual) are generally preferred in the treatment of B12 deficiency-related anemia.
References
- Salom IL, Silvis SE, Doscherholmen A "Effect of cimetidine on the absorption of vitamin B12." Scand J Gastroenterol 17 (1982): 129-31
- Marcuard SP, Albernaz L, Khazanie PG "Omeprazole therapy causes malabsorption of cyanocobalamin (vitamin-b12)." Ann Intern Med 120 (1994): 211-5
- Lavy NW "Omeprazole and vitamin B12." Ann Intern Med 121 (1994): 74
- Dutta SK "Vitamin b-12 malabsorption and omeprazole therapy." J Am Coll Nutr 13 (1994): 544-5
- Bradford GS, Taylor CT "Omeprazole and vitamin B-12 deficiency." Ann Pharmacother 33 (1999): 641-3
Drug and food interactions
naproxen food
Applies to: Prevacid NapraPAC (lansoprazole / naproxen)
GENERALLY AVOID: The concurrent use of aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs) and ethanol may lead to gastrointestinal (GI) blood loss. The mechanism may be due to a combined local effect as well as inhibition of prostaglandins leading to decreased integrity of the GI lining.
MANAGEMENT: Patients should be counseled on this potential interaction and advised to refrain from alcohol consumption while taking aspirin or NSAIDs.
References
- "Product Information. Motrin (ibuprofen)." Pharmacia and Upjohn PROD (2002):
Therapeutic duplication warnings
No warnings were found for your selected drugs.
Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.
See also
Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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