Digoxin
Brand: Lanoxin
Key warning
Caution: narrow therapeutic index; toxicity can be life-threatening
Common side effects
- Nausea and vomiting
- Loss of appetite
- Visual changes (yellow-green halos)
- Confusion
- Slow heart rate
Key interactions & cautions
- Low potassium raises toxicity risk
- Amiodarone and verapamil raise its levels
- Some diuretics lower potassium and add risk
- Narrow therapeutic index; small changes matter
Counseling points
- Take at the same time each day
- Report nausea, vision changes, or slow pulse
- Do not skip or double doses
- Keep lab and monitoring appointments
- Check pulse as instructed
High-yield study aid for exam prep — not a substitute for the package insert or a pharmacist’s dispensing reference.