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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Allergic Reaction to Penicillin

can you have a allergic reaction to amoxicillin even if you taken previously before? I can't sleep an keep getting tightness of throat not sure if its from that or i have a bad infection spreading?
Mon, 7 Nov 2011
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General & Family Physician 's  Response
Hello, welcome to Healthcaremagic. Yes a person can have allergic reaction to amoxicillin even if you have taken it previously. Tightness of throat could be due to allergic reaction or bad infection. Allergy usually presents as skin rashes or diarrhoea but it is advisable you consult your doctor for proper evaluation and cahnging of antibiotic if required. Wish you good health.
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  User's Response
Dr. Sumit Bhatti's  Response
Yes, you can have a allergic reaction to amoxicillin even if you taken it previously before. This class of penicillin based antibiotics is known as the beta lactam group and cross allergy is present. The most common side effects are skin rashes , diarrhea, nausea and vomiting.The insomnia and tightness in your throat might be due to gastritis, drug allergy or spreading infection too. Mild allergies are treated with anti-allergic medicines and steroids. Severe allergy requires discontinuation and substitution of amoxicillin with a macrolide (erythromyci) group antibiotic.
OBGYN Dr. Nilima Ghosh Hajra's  Response
welcome to healthcaremagic
it is possible to have delayed sensitivity with continuing of the same medicine it will increase .you can check it by stopping the medicine
may be that the infection is not being controlled by amoxycillin and some other medicine will be needed
better get a check up with your doctor and change trhe medicine
throat swab c/s can be done for proper antibiotic
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