The words to use
- Percentage strength (w/v)
- Grams of drug in 100 mL. So 1% is 1 g in 100 mL, which is 10 mg in every mL, and 2% is 20 mg per mL.
- Ratio strength
- A concentration written as 1 in so many, meaning 1 g in that many mL. Adrenaline 1 in 1,000 is 1 mg per mL.
- Tenfold error
- A dose ten times too big or too small, usually from a misplaced decimal point or a unit mix-up. A spoken estimate catches it.
- Sanity check
- Comparing your answer with a rough estimate or a known fact before you commit, and saying the comparison out loud.
