What medications should be taken with caution when co-administered with Methotrexate?
Methotrexate, a commonly used medication for treating rheumatoid arthritis, psoriasis, and certain types of cancers [1], requires careful consideration when co-administering with other medications.
Interactions involving antibiotics
Azathioprine, a medication used for preventing rejection in organ transplant patients, requires a significant dose reduction when taken with methotrexate due to the increased risk of toxicity [2]. The same applies to nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, which can enhance the risk of bleeding when co-administered with methotrexate [3]. Patients taking these medications should be closely monitored for signs of toxicity and bleeding.
Impact on medications for cancer treatment
Leucovorin, often used to counteract the effects of methotrexate in treating some types of cancer, should be taken in lower doses when co-administered with other medications, such as sulfonamides, which may interfere with leucovorin's effectiveness [4]. This interaction can lead to increased risk of adverse reactions.
Medications affecting the kidneys and liver
Alosetron, an anti-diarrheal medication, is contraindicated in patients taking methotrexate due to the risk of elevated liver enzyme levels [5]. Similarly, patients taking medications like folic acid supplements, should have their medication dose adjusted or monitored regularly.
Dose adjustments for specific medications
The following medications may require dose adjustments or careful monitoring when co-administered with methotrexate:
- Folic acid supplements: Patients taking folic acid supplements may require lower doses of methotrexate to avoid a decrease in its effectiveness [6].
- Oral anticoagulants: Co-administration of methotrexate with oral anticoagulants like warfarin may enhance the risk of bleeding [7].
Consult a healthcare professional
Patients undergoing or contemplating combination therapy with methotrexate and other medications should consult their healthcare provider about potential interactions, required dose adjustments, and any necessary precautions to ensure a safe and effective treatment plan.
Sources:
[1] DrugPatentWatch.com
[2] FDA.gov
[3] NCBI.nlm.nih.gov
[4] Drugs.com
[5] FDA.gov
[6] MedlinePlus.gov
[7] Epocrates.com
Sources:
1. DrugPatentWatch.com
2. FDA.gov
3. NCBI.nlm.nih.gov
4. Drugs.com
5. FDA.gov
6. MedlinePlus.gov
7. Epocrates.com