Drug interactions
Insulin inhaled + Niacin
Severity: Moderate
Insulin inhaled and Niacin: 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
Niacin can raise blood glucose by worsening insulin resistance, which may reduce the effect of inhaled insulin and raise dose requirements.
What this interaction means in plain words
Insulin inhaled and Niacin 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.
Why it happens
Niacin impairs glucose tolerance and increases insulin resistance, opposing insulin's glucose-lowering effect.
What to do
Monitor blood glucose more frequently when starting or changing niacin dose. Adjust the insulin dose as needed.
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 Niacin
- Alogliptin-metformin + Niacin Moderate
- Atorvastatin + Niacin Moderate
- Canagliflozin-metformin + Niacin Moderate
- Cholestyramine + Niacin Moderate
- Colestipol + Niacin Moderate
- Dapagliflozin-metformin + Niacin Moderate
Frequently asked questions
Can I take Insulin inhaled with Niacin?
MediHelp rates the interaction as moderate. Insulin inhaled and Niacin 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. Niacin can raise blood glucose by worsening insulin resistance, which may reduce the effect of inhaled insulin and raise dose requirements.
How serious is the interaction between Insulin inhaled and Niacin?
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 blood glucose more frequently when starting or changing niacin dose. Adjust the insulin dose as needed.
What other medicines interact with Niacin?
MediHelp also lists interactions of Niacin with, for example, Alogliptin-metformin, Atorvastatin, Canagliflozin-metformin. The full list is on the Niacin page.
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