Symptoms of allergy to cephalosporin

summary

Since I can remember, I didn't go to the hospital for an injection because of a cold, so I don't know whether I was allergic to penicillin. Last time I went to the hospital for an injection when I had a cold, the doctor prescribed cephalosporin for me without knowing whether I was allergic to it. I didn't know that I had to have a skin test before the injection. At that time, no one accompanied me, So I was so confused that I had to give an injection. Now I'm worried because I know that I have to do a skin test before I can know if I can prescribe penicillin. So, what's the symptom of allergy to cephalosporin? Let's talk about it

Symptoms of allergy to cephalosporin

Urticaria and angioedema type of drug eruption, this kind of drug eruption is more common. The rash is characterized by the occurrence of different sizes of wheal, lasting for a long time. Conscious pruritus can be accompanied by tingling and tenderness. It may be accompanied by local edema around the wind mass. Rash can appear as the only symptom, and also as a symptom of serum sickness like syndrome and anaphylactic shock.

Fixed erythema is the most common drug eruption, accounting for 22% - 44% of drug eruption. The common pathogenic drugs are sulfonamides (long-acting sulfonamides are the first), tetracyclines, antipyretic analgesics and sedatives. Edematous patches are round or oval with clear edges. In severe cases, there are one or more blisters or bullae on the patches. The number of erythema varied from one to several, and the distribution was asymmetric. Can occur in any part, often occurs in the lip and genitalia and other skin mucosa junction, often caused by friction erosion. If relapse, usually still in the original attack, with the previous left pigment spots completely or partially overlap, and often than the previous expansion, increase. Local lesions may be accompanied by pruritus, and patients with extensive lesions may have different degrees of fever. After the erythema subsides, it often leaves purple brown pigment spots, which do not subside for many years, so it has diagnostic value. A small number of edematous erythema without purple, then subsided quickly, and may not leave traces. Individual cases may be accompanied by erythema multiforme like drug eruption, urticaria like drug eruption or measles like erythema.

Exfoliative dermatitis or erythroderma type drug eruption is characterized by bright red swelling of the whole body, accompanied by exudation and scab, followed by large scaly exfoliation. The ooze has a bad smell. Mucous membrane also can congest, oedema, erosion. This type of rash can occur on the whole body at the beginning, or develop on the basis of scarlet fever like or measles like rashes mentioned above. Accompanied by obvious systemic symptoms, such as fever, nausea, vomiting, lymphadenopathy, proteinuria, hepatomegaly, jaundice, etc. It is one of the most serious types of drug eruption. Its severity is second only to bullous epidermal necrolytic drug eruption. In the age without corticosteroid, its mortality is very high. Because of the large dosage or long course of treatment, it may be combined with some toxic reactions on the basis of allergic reactions.

matters needing attention

In case of drug allergy symptoms, stop using all suspected sensitizers immediately, drink more boiled water to promote the excretion of sensitizers, use anti allergic drugs such as antihistamines, vitamin C, calcium, etc., and seek medical treatment as soon as possible. Before medication, we must read the drug instructions carefully, and be clear about the precautions and contraindications; Special attention should be paid to the ingredients of drugs to prevent the ingredients of drugs containing drugs that have caused allergy.