🔗 Drug Interaction Key Points
Quick reference to mechanisms and typical combinations behind high-frequency, dangerous drug interactions — CYP3A4/2D6, QT, serotonin, bleeding, hyperkalaemia, nephrotoxicity, hypoglycaemia. Browser-side.
Not exhaustive and not a substitute for pair-by-pair checking.
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When to use
Raise awareness of common interaction mechanisms. Verify each specific pair in a professional interaction database.
How it works
Mechanism-based groupings (enzyme inhibition/induction, additive QT/serotonin/bleeding/renal effects) with example drug combinations.
Key points
- Not exhaustive and not a substitute for pair-by-pair checking.
- CYP3A4 inhibitors raise statin/CCB/immunosuppressant levels; inducers cause contraceptive/DOAC failure.
- Serotonin syndrome: SSRI/SNRI + MAOI/linezolid/tramadol and others.
- Account for dose, duration and the individual patient.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Mechanism | CYP3A4 inhibition/induction |
|---|
→MechanismCYP3A4 inhibition/induction
- Strong inhibitors：Azole antifungals, clarithromycin/erythromycin, ritonavir, grapefruit
- Inhibition effects：Statins (myopathy/rhabdomyolysis), CCBs, immunosuppressants, some DOACs, ergot — levels ↑
- Strong inducers：Rifampin, carbamazepine, phenytoin, phenobarbital, St John's wort
| Mechanism | Additive hypoglycaemia |
|---|
→MechanismAdditive / masked hypoglycaemia
- Potentiation：Insulin/sulfonylurea + fluoroquinolone, alcohol, beta-blocker
- Masking：Beta-blockers mask the adrenergic symptoms of hypoglycaemia (palpitations/tremor)
Frequently asked questions
- What is Drug Interaction Key Points?
- Quick reference to mechanisms and typical combinations behind high-frequency, dangerous drug interactions — CYP3A4/2D6, QT, serotonin, bleeding, hyperkalaemia, nephrotoxicity, hypoglycaemia. Browser-side.
- How is Drug Interaction Key Points calculated? What is the core formula?
- Mechanism-based groupings (enzyme inhibition/induction, additive QT/serotonin/bleeding/renal effects) with example drug combinations.
- When is Drug Interaction Key Points used?
- Raise awareness of common interaction mechanisms. Verify each specific pair in a professional interaction database.
- What are the key clinical points for Drug Interaction Key Points?
- Not exhaustive and not a substitute for pair-by-pair checking. CYP3A4 inhibitors raise statin/CCB/immunosuppressant levels; inducers cause contraceptive/DOAC failure. Serotonin syndrome: SSRI/SNRI + MAOI/linezolid/tramadol and others. Account for dose, duration and the individual patient.
- What are the limits and cautions when using Drug Interaction Key Points?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Drug Interaction Key Points calculated in practice? Can you show a worked example?
- Inputs: Mechanism CYP3A4 inhibition/induction → Result: Mechanism CYP3A4 inhibition/induction（Strong inhibitors: Azole antifungals, clarithromycin/erythromycin, ritonavir, grapefruit, Inhibition effects: Statins (myopathy/rhabdomyolysis), CCBs, immunosuppressants, some DOACs, ergot — levels ↑, Strong inducers: Rifampin, carbamazepine, phenytoin, phenobarbital, St John's wort） Inputs: Mechanism Additive hypoglycaemia → Result: Mechanism Additive / masked hypoglycaemia（Potentiation: Insulin/sulfonylurea + fluoroquinolone, alcohol, beta-blocker, Masking: Beta-blockers mask the adrenergic symptoms of hypoglycaemia (palpitations/tremor)）