Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand..
As per your complain the white coating over the tongue after taking
Prednisolone that is a steroid seems to be due to yeast infection known as
Oral Thrush and redness of tongue and enlarged papillae are due to both thrush as well as mono causing
throat inflammation..You should consult an Oral Physician and get evaluated and in case if thrush is diagnosed you will be advised to take antifungal medications like Nystatin mouthwash gargles,
clotrimazole lozenges and taking ample of yoghurt and garlic..
For redness and soreness of tongue you can gargle with numbing mouthwash containing lignocaine, suck ice and take Ibuprofen..
Avoid hot and spicy food..
For
sore throat you can gargle with warm saline water, suck throat lozenges, do steam inhalations and take tylenol or ibuprofen..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.