Certain drugs can cause a severe allergic reaction, known as an
. First exposure to a drug does not cause this reaction but
subsequent exposure may. However an can occur following
the first injection of certain drugs
(e.g. polymyxin, Pentamidine, Opioids and contrast media used for x-rays).
Although many organ systems can be involved in an allergic drug reaction, the skin is most commonly affected.
Dermatologic reactions include , , (allergic contact dermatitis, photodermatitis, exfoliative dermatitis), fixed drug eruption, and erythema
multiforme (characterized by a rash and patches of red skin all over the body).
A severe allergic drug reaction characterized by blisters breaking out on the lining of the mouth, throat, anus,
genital area and eyes. A severe form of Erythema multiforme. Drugs that can cause this reaction include the
containing sulfa, barbiturates and some drugs used to treat high blood pressure and diabetes.
An allergic reaction can result from insulin made from pork or beef due to the fact that this insulin
is not exactly the same as human insulin or because it contains impurities.
The allergy can be of two forms. Sometimes an area of skin becomes red and itchy around the place where the
insulin is injected. This is called a local allergy .
In another form, the whole body can have a bad reaction. This is called a systemic allergy .
or red patches
all over the body or changes in heart and breathing rate may result. A doctor can treat this allergy by either
prescribing purified insulin or through
Common that can cause allergic reactions:
Miscellaneous others, including Aztreonam, Isoniazid, Nitrofurantoin