Drug interactions
Memantine + Sodium bicarbonate
Severity: Moderate
Memantine and Sodium bicarbonate: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Alkalinizing the urine reduces renal clearance of memantine, increasing its exposure. This can lead to adverse effects such as confusion, dizziness and somnolence.
What this interaction means in plain words
Memantine and Sodium bicarbonate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Memantine belongs to Central Nervous System; Sodium bicarbonate belongs to Gastrointestinal Tract.
Why it happens
Increased passive tubular reabsorption of memantine in alkaline urine.
What to do
Monitor for memantine toxicity and consider dose reduction if urine alkalinization is sustained.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Memantine
- Ketamine + Memantine Major
- Acetazolamide + Memantine Moderate
- Aluminum hydroxide + Memantine Moderate
- Amantadine + Memantine Moderate
- Dextromethorphan + Memantine Moderate
- Dofetilide + Memantine Moderate
Other interactions of Sodium bicarbonate
- Acetylsalicylic acid + Sodium bicarbonate Moderate
- Alendronate + Sodium bicarbonate Moderate
- Amantadine + Sodium bicarbonate Moderate
- Carbonyl iron + Sodium bicarbonate Moderate
- Cefditoren + Sodium bicarbonate Moderate
- Cefpodoxime + Sodium bicarbonate Moderate
Frequently asked questions
Can I take Memantine with Sodium bicarbonate?
MediHelp rates the interaction as moderate. Memantine and Sodium bicarbonate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Alkalinizing the urine reduces renal clearance of memantine, increasing its exposure. This can lead to adverse effects such as confusion, dizziness and somnolence.
How serious is the interaction between Memantine and Sodium bicarbonate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for memantine toxicity and consider dose reduction if urine alkalinization is sustained.
What other medicines interact with Memantine?
MediHelp also lists interactions of Memantine with, for example, Ketamine, Acetazolamide, Aluminum hydroxide. The full list is on the Memantine page.
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