“Prednisone is in a class of medications called corticosteroids. It works to treat patients with low levels of corticosteroids by replacing steroids that are normally produced naturally by the body. It works to treat other conditions by reducing swelling and redness and by changing the way the immune system works.” 
The side effects of Prednisone can include but are not limited to symptoms such as headaches, dizziness, tiredness or weakness, insomnia, vision problems, depression, confusion, heartburn and unfortunately much more. You can view a complete list of known side effects on the following page: 
Hope this info helps!
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Re: Verwon (# 1)
I'm allergic to what I don't know, so my health care center prescribed Trolic 5mg and I take 4 of those when I'm swelling up. Unfortunately, one side effect I'm noticing is weight gain, where literally my feet are swelling and I don't know what to do. Please advise!