Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that the cause of your teeth decaying after taking the medicines is dry mouth
However tooth decay
is not a direct side effect but Dry mouth is the cause that secondarily cause teeth decay as the reduced saliva flow causes reduced flusing of debris from teeth and accumulation of plaque
, tarter and cause bacterial overgrowth causing decay..
You might not be getting the information as it must still be present on site..
As far as sudden death is concerned it can occur due to severe anaphylactic reaction
to the drug but does not seems to be in your case, so don't worry about it..
The cause of teeth decaying in your case is dry mouth only and you should get the teeth treated..
Along with it start chewing sugar free chewing gum, suck tart candies to stimulate saliva flow..
You should also instil artificial saliva drops to lubricate the mouth..
Gargle with specialized mouthwash like Biotene
and avoid regular mouthwash as they have drying effect in mouth..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.