Ceftazidime and aztreonam have the same side chain.These cephalosporins all have the same or similar side chains. Ceftriaxone allergy – avoid cefotaxime, cefepime and cefuroxime.Cefalexin and cefaclor have a similar side chain to amoxicillin: Avoid cefalexin or cefaclor if the patient has a history of serious amoxicillin or ampicillin allergy.Cefazolin has no common side-chains with other beta-lactam antibiotics, so can often be tolerated in patients with a penicillin or a cephalosporin allergy.
Similar - Cefepime, Ceftriaxone, Cefotaxime, Ceftazidime. Similar - Ampicillin, Cefaclor, Cefalexin. 1Īntibiotics with shared structural similarities, such as those with the same or similar R1-group side-chains are more likely to cross-react: An estimated 1-2% of patients with a penicillin allergy react to cephalosporins. The prevalence of cross-reactivity between beta-lactams is lower than originally thought. Piperacillin with tazobactam - Tazopip, PiperTaz, Tazocin, Piptaz Procaine benzylpenicillin CilicaineĬross-reactivity between beta-lactamclassesĪ history of penicillin allergy should not rule out the use of cephalosporins. Phenoxymethylpenicillin (Penicillin V) - Aspecillin, Cilicaine VK, Cilicaine V, Cilopen. Flucloxacillin - Flubiclox, Flucil, Flopen, Flucil, Staphylex. 
Benzathine benzylpenicillin - Bicillin-LA. Benzylpenicillin (Penicillin G) - BenPen. Ampicillin - Agpen, Alphacyn, Ampicyn, Austrapen, Ibimicyn, Penamp. Amoxicillin - Alphamox, Amoxil, Cilamox, Ibiamox, Fisamox. The following list includes the penicillins available in Australia, and the common brand names: Penicillins are some of the most frequently prescribed antibiotics in clinical practice. Penicillin and cephalosporin allergies On this page
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