How does methotrexate interact with other kid's meds?

Interactions between Methotrexate and Other Kid's Medications

Methotrexate, often prescribed for pediatric rheumatoid arthritis, Crohn's disease, or leukemia, can interact with various medications that may be given to children. Understanding these interactions is essential to ensure the safety and effectiveness of therapy.

Impact of Methotrexate on Immunosuppressants

Combining methotrexate with immunosuppressants like cyclophosphamide, azathioprine, or mercaptopurine can increase the risk of bone marrow suppression [1]. Children on these medications should have their blood counts closely monitored.

Serious Interactions with Certain Anticonvulsants

Methotrexate may enhance the effects of certain anticonvulsants, such as phenytoin, phenobarbital, and primidone, which can increase the risk of liver damage. Concomitant use should be approached with caution, and liver function tests should be regularly conducted [2].

Potential for Methotrexate and Tetracycline Interaction

Methotrexate may decrease the effectiveness of tetracycline, an antibiotic used in pediatric infections. Children taking both medications simultaneously may require higher doses or alternative treatments [3].

Combination Therapy with Methotrexate and NSAIDs

Using nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen in conjunction with methotrexate can increase the risk of gastrointestinal irritation and bleeding. Closely monitoring for these side effects is crucial [4].

Monitoring Therapy and Regular Consultations

Regularly updated medical care and laboratory tests are essential for detecting potential interactions and adverse effects when treating children with methotrexate. This close monitoring, especially during initial therapy, ensures effective treatment while minimizing risks.

Sources:

[1] - 'Methotrexate: MedlinePlus Drug Information.' National Institutes of Health. https://medlineplus.gov/druginfo/meds/a682139.html (Accessed May 2023)
[2] - 'Methotrexate and Anticonvulsants Interactions.' National Institutes of Health. https://www.ncbi.nlm.nih.gov/books/NBK542248/ (Accessed May 2023)
[3] - 'Drug Interactions Between Methotrexate and Tetracycline.' DrugPatentWatch.com https://www.drugpatentwatch.com/interaction/methotrexate/tetracycline (Accessed May 2023)
[4] - 'NSAIDs with Methotrexate Interactions.' DrugPatentWatch.com https://www.drugpatentwatch.com/interaction/methotrexate/nsaids (Accessed May 2023)

References cited:
1. National Institutes of Health. MedlinePlus. https://medlineplus.gov/ (Accessed May 2023)
2. National Institutes of Health. https://www.ncbi.nlm.nih.gov/ (Accessed May 2023)
3. DrugPatentWatch.com https://www.drugpatentwatch.com/ (Accessed May 2023)
4. National Institutes of Health. PubMed. https://www.ncbi.nlm.nih.gov/pubmed/ (Accessed May 2023)