The physician orders digoxin (Lanoxin) 0.15 mg PO daily for a child. The pharmacy supplies the digoxin in liquid form at a concentration of 0.05 mg/ml.
How much of the medication should the nurse administer at each dose:
- A. 0.2 ml
- B. 0.5 ml
- C. 3 ml
- D. 5 ml
The correct answer is C. 3 ml.
Here's how we can calculate the correct dosage:
- Determine the desired dose: The physician ordered 0.15 mg of digoxin.
- Determine the concentration of the medication: The medication is available in a concentration of 0.05 mg/ml.
- Set up a proportion: 0.05 mg/ml = 0.15 mg/x ml
- Solve for x: x = 0.15 mg / 0.05 mg/ml = 3 ml
Therefore, the nurse should administer 3 ml of the digoxin solution to give the patient the prescribed dose of 0.15 mg.
Digoxin Dosage Calculation:
Understanding Digoxin:
- Purpose: Digoxin is a cardiac glycoside used to treat heart failure and certain heart rhythm disorders. It helps to strengthen the heart's contractions and improve blood flow.
- Dosage: The appropriate dosage of digoxin varies depending on the patient's age, weight, and underlying medical conditions.
Calculating Digoxin Dosage:
- Desired Dose: The physician will prescribe a specific dose of digoxin.
- Medication Concentration: The concentration of the digoxin solution will be indicated on the medication label.
- Calculation: To determine the volume of medication to administer, use the following formula:
Volume (ml) = Desired dose (mg) / Concentration (mg/ml)
Example:
If a patient is prescribed 0.25 mg of digoxin daily and the medication is available as a 0.125 mg/ml solution, the nurse would administer:
Volume (ml) = 0.25 mg / 0.125 mg/ml = 2 ml
Safety Considerations:
- Overdose: Digoxin is a potent medication, and overdose can be dangerous. It is essential to administer the correct dosage and monitor the patient for signs of toxicity.
- Monitoring: Patients taking digoxin should be closely monitored for signs of toxicity, such as nausea, vomiting, visual disturbances, and irregular heart rhythms.
- Drug Interactions: Digoxin can interact with other medications, so it is important to inform your healthcare provider about all medications you are taking.
Conclusion:
Accurate dosage calculation is crucial when administering digoxin. By understanding the formula and following safety guidelines, healthcare professionals can ensure that patients receive the correct dose of this medication.
