Drug Interactions between allopurinol and Synthroid
This report displays the potential drug interactions for the following 2 drugs:
- allopurinol
- Synthroid (levothyroxine)
Interactions between your drugs
No interactions were found between allopurinol and Synthroid. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.
allopurinol
A total of 436 drugs are known to interact with allopurinol.
- Allopurinol is in the following drug classes: antigout agents, antihyperuricemic agents.
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Allopurinol is used to treat the following conditions:
- Calcium Oxalate Calculi with Hyperuricosuria
- Cardiothoracic Surgery (off-label)
- Gout
- High Risk Percutaneous Transluminal Angioplasty (off-label)
- Hyperuricemia Secondary to Chemotherapy
- Leishmaniasis (off-label)
- Mania (off-label)
- Reactive Perforating Collangenosis (off-label)
- Urinary Tract Stones (off-label)
Synthroid
A total of 239 drugs are known to interact with Synthroid.
- Synthroid is in the drug class thyroid drugs.
- Synthroid is used to treat the following conditions:
Drug and food interactions
allopurinol food
Applies to: allopurinol
Allopurinol should generally be taken after a meal to reduce side effects. If your daily dose exceeds 300 mg, you may also ask your healthcare provider if it is okay to divide the total daily dose into smaller doses given more frequently instead of once a day, as this may also reduce stomach upset that can happen with allopurinol. It is best to avoid or limit the consumption of alcohol, as it can increase drowsiness or other nervous system side effects of allopurinol. You should also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. 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.
levothyroxine food
Applies to: Synthroid (levothyroxine)
The timing of meals relative to your oral levothyroxine dose can affect the absorption of the medication. Therefore, levothyroxine should be taken on a consistent schedule with regard to time of day and relation to meals to avoid large fluctuations in blood levels, which may alter its effects. In addition, absorption of levothyroxine may be decreased and/or delayed by foods such as soybean flour, cotton seed meal, walnuts, dietary fiber, calcium, calcium fortified juices and grapefruit or grapefruit juice. These foods should be avoided within several hours of dosing if possible. 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.
levothyroxine food
Applies to: Synthroid (levothyroxine)
Using multivitamin with minerals together with levothyroxine may decrease the effects of levothyroxine. You should separate the administration of levothyroxine and multivitamin with minerals by at least 4 hours. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. 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.
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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