Methotrexate (Chemical) appears in the BNF filter twice - as 0801030P0 and 1001030U0. In this case I think the dosages are different in different chapters (10mg/0.4ml for 08 and 10mg/0.2ml for 10), so researchers might be able to identify which one is which, but I imagine there might be other cases where it's more difficult.

Methotrexate (Chemical) appears in the BNF filter twice - as
0801030P0and1001030U0. In this case I think the dosages are different in different chapters (10mg/0.4ml for08and 10mg/0.2ml for10), so researchers might be able to identify which one is which, but I imagine there might be other cases where it's more difficult.