Yes, 0.25 mg is exactly the same as 250 mcg of digoxin.
This is a straightforward unit conversion question. One milligram (mg) equals 1,000 micrograms (mcg or µg), so 0.25 mg = 250 mcg—they are identical doses.
Unit Conversion Explanation
- 1 mg = 1,000 mcg
- 0.25 mg × 1,000 = 250 mcg
This is confirmed by FDA drug labeling, which describes digoxin tablets as "125 mcg (0.125 mg) or 250 mcg (0.25 mg)" 1, explicitly showing these are equivalent expressions of the same dose.
Clinical Context for Digoxin Dosing
Multiple guidelines consistently reference the 0.25 mg (250 mcg) dose as a standard maintenance dose:
- Standard adult maintenance dose: 0.25 mg daily is commonly employed in adults with normal renal function 2, 3, 4
- Lower doses: 0.125 mg (125 mcg) or 0.0625 mg (62.5 mcg) should be used in elderly patients, those with renal impairment, or low lean body mass 2, 4
Important Clinical Caveats
When prescribing or administering digoxin, be aware that:
- Different formulations have different bioavailability: Digoxin solution in capsules (Lanoxicaps) 200 mcg is approximately equivalent to digoxin tablets 250 mcg due to enhanced absorption 1, 5
- Always verify the formulation when converting between products
- The unit notation matters for safety: Using "mcg" instead of "µg" is preferred to avoid confusion with "mg"
The bottom line: 0.25 mg and 250 mcg are mathematically and clinically identical for the same formulation of digoxin.