It can be a little unpleasant, but it is over within less than a minute
Its also reasonable to check the level if youve been on medication to reduce stomach acid for a long time
Consequently, I wouldn't recommend using expired ampoules (unless very recently out-of-date) I have been told by my pharmacy if the liquid is not opalescent but clear, there is nothing wrong with the ampoules and you can use them far after sell by date
Symptoms like tiredness, tingling, memory issues, or weakness could be linked, but a simple blood test is the best way to confirm a vitamin B12 deficiency.
The changes are significant enough that other people start commenting
*Due to legal requirements medicines may not be returned except to correct an error in despatch or in response to an "official recall"