Dexamethasone appears to be a very powerful steroid, side effects can be.
Aggression.
agitation.
anxiety.
decrease in the amount of urine.
fast, slow, pounding, or irregular heartbeat or pulse.
headache.
mental depression.
mood changes.
I think it's the tabs Baz. Keep calm & good luck with your appointment later.
Not really enough information for a reasonable reply.
It is extremely unlikely to be due to the steroid tablets...extremely unlikely.
With the virtual non existent of information, all I can say it seems no big deal and not life threatening.
Most likely.....but an inner ear problem does come to mind.
Not an urgent situation which could easily be monitored over the next week or so and if still worried then see your GP.
What medication are you taking?
How long have these episodes been present?
How long do they last..secs? mins?
Do you experience nausea with these incidents?
Have you perceived any hearing loss recently?