Answer first: the highest-value practices are the boring ones — verify the material, keep records, start low, and know which symptoms end the conversation and start a clinical one.
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.
Keep a written log: date, dose, lot, site, and anything noticed. It converts an anecdote into a record and is what makes any later consultation productive.
The symptom patterns listed above correspond to recognised emergencies with defined presentations, which is why recognition rather than management is the useful skill.
This site sells nothing, is affiliated with no supplier and takes no payment from any of them.
Tell a clinician. It is the decision that makes every other problem solvable.