Thanks for placing your query here.
I can appreciate your concerns.
injection contains two compounds namely ceftrioxone & tazobactam
As far as I understand giving expired montaz inj can probably have less or no antibacterial effect .
I have not come across of any report or incidence of toxic or life threatening effect of expired montaz injection.
The swelling in the eyelids can be due to excess intravenous fluids given.
you can discuss the issues with your current doctor.
Hope I have answered your query.
If you have any further questions I will be happy to help.