The symptoms of a penicillin allergy can range from mild to severe, and they may occur immediately or begin a few hours or days after starting the medication. Here is what you should look for:

Identify Immediate Allergic Reactions

• Skin Rash or Hives: An itchy skin rash or hives might appear on the body.
• Wheezing or Difficulty Breathing: Some people may find it hard to breathe if they have an allergic reaction to penicillin.
• Swelling: Swelling of the face, tongue, or lips can occur if you're allergic to penicillin.
• Dizziness: A sudden drop in blood pressure might make you feel lightheaded or faint.
• Anaphylaxis: In severe cases, you might experience anaphylaxis, a life-threatening allergic reaction that causes difficulty breathing and a sudden drop in blood pressure.

Observe Delayed Allergic Reactions

• Delayed Rash: A red or purple rash can appear a few days later, and it might spread across the body.
• Drug Fever: You might develop a fever in response to the penicillin.
• Serum Sickness: In rare cases, you might experience symptoms similar to those of the flu, such as joint pain, fever, and body aches.

If you display any of these symptoms after consuming penicillin, contact your healthcare provider immediately for advice. It's crucial to rule out other causes for these symptoms which might not be related to a penicillin allergy.