Thanks for your question on Healthcare Magic. I can understand your concern. In my opinion, she is mostly suffering from post viral malaise and fatigue. Prednisone is not causing these symptoms. She was having cold. And most common cause for cold is viral infection. Viral infection is known to cause muscle inflammation and related malaise, fatigue, body pain etc. No need to worry for this. Drink plenty of fluids orally and keep yourself hydrated. Apply warm water pad on affected areas body. She can take simple painkiller like paracetamol. These symptoms will gradually improve over 1 week. Hope I have solved your query. I will be happy to help you further. Wishing good health to your daughter. Thanks.