Dilantin IV drip and swelling.?

It is not normal, and is quite concerning. The concern is that the needle or IV catheter may not have been completely in his vein and some of the medication may have gone into his skin tissue (extravasation), which can cause burning pain and severe local reactions including chemical cellulitis (infection of the cells of the skin) and frank tissue necrosis (tissue death),

in some severe causes, amputation of affected limb has been necessary. Return to the doctor, let them know about the Dilantin infusion and swelling and continued pain.

Moist heat will help draw it out, but depending on the amount, it might be necessary to make sure there is not a cellulitis or compartment syndrome, Dilantin is a harsh medication intravenously, and if he is a tough kid, and he continues to complain of pain and decreased range of motion, I'd listen, get it checked out. If he cries wolf all the time, that's a different story.

Dilantin Drip

Try warm compresses. If it doesn't work or it turns a different color then he needs to see a doctor. It might have infiltrated and the medication stayed in that one area.