Frequent question: Are penicillin and sulfa allergies related?

I’m writing about a recently posted “Ask the Expert” column in reply to a question about penicillin allergy and cross-reactivity with sulfa drugs. Dr. Briceland is certainly correct that there is no immunologic cross-reactivity between penicillins and sulfa drugs.

Amoxicillin belongs to a class of drugs called penicillins. It is a penicillin type antibiotic and it does not have sulfa in it.

Is Penicillin an allergen?

Penicillin allergy is an abnormal reaction of your immune system to the antibiotic drug penicillin. Penicillin is prescribed for treating various bacterial infections. Common signs and symptoms of penicillin allergy include hives, rash and itching.

What drugs should be avoided with sulfa allergy?

Drugs to Avoid With Sulfa Allergies

  • Sulfamethoxazole / trimethoprim (Bactrim, Sulfatrim), a sulfa combination drug that can be taken in liquid or pill form for many types of infections.
  • Sulfacetamide (BLEPH-10), drops for eye infections.
  • Sulfadiazine silver (Silvadene), a cream to prevent and treat burn infections.
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What antibiotics should you avoid if you are allergic to penicillin?

It is generally recommended that you avoid all drugs in the immediate penicillin family (amoxicillin, ampicillin, amoxicillin-clavulanate, dicloxacillin, nafcillin, piperacillin-tazobactam as well as certain drugs in the cephalosporin class (a closely related class to penicillins).

Is sulfa an antibiotic?

Sulfonamides (sulfa drugs) are drugs that are derived from sulfanilamide, a sulfur-containing chemical. Most sulfonamides are antibiotics, but some are prescribed for treating ulcerative colitis.

How do you treat a sulfa allergy?

If you have an allergic reaction to sulfa drugs, treatment will be centered on relieving your symptoms. Your doctor may prescribe antihistamines or corticosteroids to relieve hives, rash, and itching. A bronchodilator may be prescribed if you have respiratory symptoms.

What does penicillin allergy look like?

Common allergic reactions to penicillin include rashes, hives, itchy eyes, and swollen lips, tongue, or face. In rare cases, an allergy to penicillin can cause an anaphylactic reaction, which can be deadly. This type of reaction usually happens within an hour after you take penicillin.

What Antibiotics can I take if I’m allergic to penicillin?

Kids or adults who are allergic to penicillin may be able to take one of these antibiotics instead:

  • Azithromycin (Zithromax, Zmax, Z-Pak)
  • Cephalosporins, including cefixime (Suprax), cefuroxime (Ceftin), and cephalexin (Keflex)
  • Clarithromycin (Biaxin)
  • Clindamycin (Cleocin)

Does Penicillin still work if you are allergic?

Even patients with severe penicillin allergy histories are often able to take penicillins safely again, because penicillin allergy often does not persist for life.

What diuretics are safe with sulfa allergy?

Diuretics that do not contain a sulfonamide group (eg, amiloride hydrochloride, eplerenone, ethacrynic acid, spironolactone, and triamterene) are safe for patients with an allergy to sulfa.

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What can I take for UTI if allergic to sulfa?

TMP-SMX has been the standard therapy for UTIs; patients with a sulfa allergy can take trimethoprim alone and achieve a similar cure rate.15 мая 2002 г.

What are the side effects of sulfa drugs?

Side Effects of Sulfonamides

  • Skin rash.
  • Itching.
  • Headache.
  • Dizziness.
  • Diarrhea.
  • Tiredness.
  • Nausea or vomiting.
  • Pale skin.

Can I take amoxicillin if I’m allergic to penicillin?

If you know that you’re allergic to penicillin, you shouldn’t take penicillin or penicillin antibiotics such as amoxicillin. The reverse is also true: If you’re allergic to amoxicillin, you shouldn’t take penicillin or other penicillin antibiotics.

Can I eat blue cheese if I’m allergic to penicillin?

The main cheese-making Penicilliums — roqueforti (blue cheese), camemberti, (Camembert and Brie) and glaucum (Gorgonzola) — are not penicillin producers. They do produce other antibacterial metabolites — as well as human toxins and allergens — but no medically useful antibiotics.

Can you outgrow a penicillin allergy?

As with many other types of allergies, people who once suffered from penicillin allergy can outgrow the allergy. What this means is that there are often many people avoiding these antibiotics at times in their life when the antibiotics would actually not cause them any problems.

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