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Duromine often causes side effects like dry mouth
The above mentioned symptoms can be due to the habits like tobacco or pan chewing.
Apply topical steroids on the affected area.
Maintain oral hygiene
Rinse your mouth after every meals.
Take vitamin c
Plenty of fruits as well as nutiritious diet has to be ingested.
Since duromine is a weight reduction tablet,you can try exercises,yoga,balanced diet etc, to reduce weight.