Allergic to morphine face swells with rash and feeling of shaking inside was given dilaudid after surgery having the same symptoms could i be allergic?

Narcotic allergy: Narcotics are non-specific histamine releasers from mast cells. Histamine release can lead to itching, rash, hives or swelling. Some persons are more sensitive to these medications than others. Some narcotics are better tolerated than others as well.True allergy to these medicines is rare but you should still identify these medications as part of your 'allergies' is asked by a medical care person.