Penicillin belongs to the group of drugs called antibiotics that is used to treat bacterial infection. These drugs were the first antibiotic that doctors used. Penicillin works by interfering with bacterial cell walls. Penicillins are not recommended in people with bleeding disorders, kidney disease, gastrointestinal problems, and breastfeeding women.

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Is it important to get tested for Penicillin allergy now to see whether I could still have the allergy I had twenty years ago?

Query: Hello doctor, About 20 years ago, Penicillin caused serum sickness in me. My symptoms included a high temperature, chills, rash, and arthritis. Is it worthwhile to undergo Penicillin allergy testing today to determine whether I could still have the allergy I had 20 years ago? Kindly help.  Read Full »

Dr. Shyam Kalyan. N

Answer: Hello, Welcome to For a variety of uses, Penicillin, and related chemicals are still often employed as antibiotics. Although the ones now being used are unlikely to cause any serious allergies, it will still be beneficial to learn. You can still test for a Penicillin allergy. Doing th...  Read Full »

I am taking Penicillin tablet for dental infection but swelling is still present. Why?

Query: Hi doctor,I had an abscess in the tooth and I consulted a dentist. The dentist informed me that treatment can be done after the swelling subsides. I have been taking the tablet Penicillin for a week. However, swelling is still present, and the left lip and chin are still numb. Now I am experiencing ...  Read Full »

Dr. Soheel Hussain Zargar

Answer: Hi, Welcome to I understand your concern. You have been taking the tablet Penicillin for the abscess in your tooth. Persistent pain indicates that the source of infection is not addressed. The tooth pain can radiate to the neck, head, and arm on the same side. Antibiotics offer sympto...  Read Full »

Does Penicillin intake cause the development of hives in Epstein-Barr virus infections?

Query: Hi doctor, I was taken into primary care last night and diagnosed with a septic throat and hives on my body. I was given a prescription for antibiotics and steroids. It has been 24 hours since I was checked, and my throat is better, but the hives on my body have spread and started to form hard lump...  Read Full »

Dr. Rajendran R. Nayar

Answer: Hi, Welcome to I understand that you are suffering from fever, sore throat, hives, and blisters. You are currently on antibiotics, steroids, and anti-histamines. Persons with infection by the Epstein-Barr virus can result in rashes when they take Penicillin-containing medicatio...  Read Full »

Will intake of Penicillin help to reduce high ASO titer levels and generalized body weakness?

Query: Hi doctor,I was feeling tired all the time before few months. I went to a doctor and he asked me to do a ASO titer test with a couple of other tests. The result was 407 IU/mL. So, he told me to take Penicillin for the next three months. After a month, I did another test and visited another doctor. M...  Read Full »

Dr. Vineet Jain

Answer: Hello, Welcome to You can have fibromyalgia. It is a common post-infection, especially like Covid or post streptococcus infection. The high ASO (antistreptolysin O) titer level indicates that you are resistant to Penicillin or the levels do not correlate with your symptoms. You can do...  Read Full »

Should I get my tonsils removed for recurrent tonsillitis?

Query: Hi doctor, In June, I had a bacterial infection, strep throat which I then took Penicillin for it. I did not finish the course. I stopped probably five days early. Because of this two weeks later out of no where my tonsilitis returned as the bacteria supposedly found the strength to cause pain aga...  Read Full »

Dr. Laxminarasimha G

Answer: Hi, Welcome to I had gone through all your history of complaints and images (attachment removed to protect patient identity) that you post can give a picture of diagnosis that pharyngotonsillitis (grade 3). Grade 3 means enlarged tonsils half of the size coming out of tonsillar fo...  Read Full »

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