Drug interactions between methotrexate and Tamiflu
Interactions between your drugs
Applies to: methotrexate and Tamiflu (oseltamivir)
Oseltamivir may increase the blood levels and side effects of methotrexate. You may be more likely to experience this interaction if you have kidney disease or are receiving a high dose of methotrexate. The risk may be less if you are using methotrexate once a week to treat certain forms of arthritis. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor immediately if you develop symptoms of potentially serious side effects of methotrexate such as mouth ulcers or sores; vomiting; diarrhea; rash; loss of appetite; joint pain or swelling; yellow discoloration of skin and eyes; dark urine; shortness of breath; dry cough; paleness; dizziness or fainting; unusual bruising or bleeding; seizures; infection; and flu-like symptoms (fever, chills, body aches, sore throat, muscle weakness). It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Drug and food interactions
Applies to: methotrexate
Caffeine may reduce the effectiveness of methotrexate in the treatment of arthritis. If you are receiving methotrexate for arthritis, you may want to limit your intake of caffeine-containing foods and medications. Check with your doctor or pharmacist if you have concerns or are uncertain what products may contain caffeine.
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.
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 information available.|
Do not stop taking any medications without consulting your healthcare provider.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.