The relevant framing is that risk here comes from three separate places: what the material is, how it is handled, and what it does. They need three different mitigations.
Know the symptoms that end the discussion: severe epigastric pain radiating to the back, persistent vomiting with reduced urine output, spreading redness with fever, jaundice, chest pain or breathlessness.
Mechanically, have a plan for stopping before you start, including what you would do with the remaining material and how you would tell someone what you had taken.
Withheld information is a recognised barrier to effective clinical assessment, and disclosure changes management in a substantial fraction of cases.
Start lower and go slower than the label. Time costs nothing here.
edited 31 Jan 2025 by ines_brandt — fixed an arithmetic slip in the third paragraph
3Adding for future readers: ask for the lot-specific certificate before ordering, not after. – Dr_Colm_Fitzhenry 4 months ago 4I have kept every invoice and declaration, which I gather is the useful habit. – fiadh_cronin 6 months ago add a comment