An allergic reaction to cefaclor may occur in patients.Logical formLearned from1 sentences. Some patients may experience an allergic reaction to a drug.Logical formLearned from1 sentences. Some users may have allergic reactions to a rubber.Logical formLearned from1 sentences. Allergic reactions can be to a rubber.Logical formLearned from1 sentences. A person can be allergic to feathers.Logical formLearned from1 sentences. A mechanism of allergic reactions may be understood.Logical formLearned from1 sentences. A history of a development of an allergic reaction may give a clue.Logical formLearned from1 sentences. Side effects of penicillins may include allergic reactions.Logical formLearned from1 sentences. Indications of an allergic reaction to amoxicillin may include fever.Logical formLearned from1 sentences. Some persons can be allergic to some flowers.Logical formLearned from1 sentences.