Does Ascorbic Acid Interact with Amphetamine?
Ascorbic Acid and Amphetamine have a moderate drug interaction according to U.S. FDA drug labeling data. Ascorbic acid may acidify urine and lower amphetamine serum concentrations by increasing renal excretion. Standard monitoring is warranted. The mechanism involves urine acidification increases renal excretion. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Moderate
- Ascorbic Acid Class
- Vitamin C
- Amphetamine Class
- Central Nervous System Stimulant
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Ascorbic Acid and Amphetamine occurs because urine acidification increases renal excretion. Clinically, this means ascorbic acid may acidify urine and lower amphetamine serum concentrations by increasing renal excretion. standard monitoring is warranted. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.
What To Tell Your Doctor or Pharmacist
If you are taking Ascorbic Acid and your doctor is considering prescribing Amphetamine (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider