Which part of the arm did you break?
Have you been put into a cast and treated conservatively or have you had surgery to fix the fracture internally?
If it was the humerus some doctors will put you in a polysling to limit movement, although 9/10 they will advise you to remove the sling and keep the joints moving.
Either way follow the advice given by the orthopaedic consultant who assessed you, you must have had swelling of the soft tissue surrounding the fracture which will be why they recommended anti inflammatries, paracetamol for the pain, these 2 medications can be taken together. Try to avoid caffine, smoking and believe it or not chocolate... these all delay the healing process, a good balanced diet is always recommended to aid any injury.

I'm assuming you've been advised to non-weight bare through the arm, but make sure you maintain full range of movement in the shoulder, elbow and fingers. (this is if your in a below elbow cast, if your in a full cast then work on elbow and finger movements) but firstly go with the treatment method that was recommended to you.

Kelly