Drug interactions
Insulin isophane protamine human + Lithium
Severity: Minor
Insulin isophane protamine human and Lithium: minor 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
Lithium can alter glucose tolerance, causing hyperglycemia in some patients and hypoglycemia in others, which may change insulin needs. The effect is variable and unpredictable.
What this interaction means in plain words
Insulin isophane protamine human and Lithium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Insulin isophane protamine human belongs to Endocrine; Lithium belongs to Central Nervous System.
Why it happens
Lithium affects insulin secretion and cellular glucose handling; the exact mechanism is not well established.
What to do
Monitor blood glucose more often after starting or adjusting lithium and adjust the insulin dose to readings.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Insulin isophane protamine human
- Ethanol + Insulin isophane protamine human Major
- Insulin isophane protamine human + Pioglitazone Major
- Insulin isophane protamine human + Rosiglitazone Major
- Acarbose + Insulin isophane protamine human Moderate
- Albiglutide + Insulin isophane protamine human Moderate
- Alogliptin + Insulin isophane protamine human Moderate
Other interactions of Lithium
- Lithium + Thioridazine Contraindicated
- Lithium + Vandetanib Contraindicated
- Aceclofenac + Lithium Major
- Acemetacin + Lithium Major
- Amisulpride + Lithium Major
- Amlodipine-benazepril + Lithium Major
Frequently asked questions
Can I take Insulin isophane protamine human with Lithium?
MediHelp rates the interaction as minor. Insulin isophane protamine human and Lithium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Lithium can alter glucose tolerance, causing hyperglycemia in some patients and hypoglycemia in others, which may change insulin needs. The effect is variable and unpredictable.
How serious is the interaction between Insulin isophane protamine human and Lithium?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose more often after starting or adjusting lithium and adjust the insulin dose to readings.
What other medicines interact with Insulin isophane protamine human?
MediHelp also lists interactions of Insulin isophane protamine human with, for example, Ethanol, Pioglitazone, Rosiglitazone. The full list is on the Insulin isophane protamine human page.
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