The medicine we use for our illnesses and sorrows is like a friend who helps save our lives. But sometimes, this friend can become an enemy to our body without us knowing. That is, some people can be allergic to certain types of medicine . Have you ever felt something strange or different in your body after taking a medicine? Then this story will be very important for you.
What exactly is an allergy?
Simply put, an allergy is a bit of a complicated system of our body's defenses, the immune system. Think of our body as a fortress, and the immune system is the soldiers inside it. Usually, these soldiers attack the real enemy, which is something like viruses or bacteria that cause disease.
But what happens in an allergy is that these soldiers see something harmless that is actually coming to help us (in this case, a medicine), and mistakenly think that it is a dangerous enemy and start attacking it. In this fight, our body releases large amounts of chemicals like histamine . It is these chemicals that cause the symptoms of an allergy.
What are the symptoms of a drug allergy?
Symptoms of a drug allergy can come on suddenly, or they can appear hours or even days after taking the drug. Some people develop an allergy the first time they take the drug. Others may have taken the same drug several times without any problems and then suddenly develop an allergy.
These symptoms can range from mild to life-threatening. Let's take a look at what they are.
| Characteristic type | Common symptoms |
|---|---|
| A common allergic reaction |
|
| Anaphylaxis - Immediate treatment required! |
|
Anaphylaxis is a life-threatening medical emergency. If you experience any of these severe symptoms, go to the nearest hospital Emergency Department (ETU) immediately.
Is this an allergy? Or a side effect? How do you know for sure?
This is where many people get confused. Like all medications, there can be minor side effects. For example, when you take some medications, you feel dizzy or your stomach feels like it's turning over. Not all of these are allergies. It's very important to understand the difference between the two.
| Characteristic | Drug Allergy | A side effect of a medicine |
|---|---|---|
| Underlying cause | An incorrect response of the immune system. | A direct result of the drug's action. |
| Common features | Skin rashes, eczema, itching, swelling, difficulty breathing. | Nausea, stomach ache, diarrhea, constipation, headache, drowsiness, and lethargy. |
| Seriousness | It can range from mild to life-threatening anaphylaxis. | It is usually not serious, but can sometimes cause discomfort. |
If you experience any symptoms after taking a medication, don't try to figure it out on your own. The best thing to do is talk to your doctor. He or she can determine whether it's an allergy or a side effect and give you the advice you need.
What medications cause the most allergies?
In fact, anyone can be allergic to any medication. It doesn't matter if it's over-the-counter or prescribed by a doctor. However, there are some medications that are more likely to cause allergies than others.
- Penicillin and other antibiotics in that group are the most common allergens.
- Sulfa drugs.
- Painkillers, such as aspirin, ibuprofen, and naproxen.
- Some anti-seizure drugs.
- Some medications for blood pressure, especially those in the ACE Inhibitors group.
- Contrast dyes used in scans such as X-rays and MRIs .
- Some people can be allergic to some Ayurvedic or herbal medicines .
How does the doctor know if this is an allergy?
When you go to see the doctor, he will ask you a few questions.
- What medicine did you take?
- How long ago did the symptoms start?
- Have you ever had allergies to other medicines or foods?
- What other illnesses do you have?
Based on your answers, your doctor can make a good decision. If you suspect an allergy to an antibiotic like penicillin, a skin test may be done to confirm the diagnosis. However, these tests cannot be done for all medications. Sometimes they can be dangerous. If you have had a severe allergic reaction to a medication in the past, your doctor may not give you that medication again and may suggest an alternative.
How is it treated?
The first goal of treatment is to control your symptoms.
1. Stopping the medication that caused the allergy: As advised by your doctor, you should immediately stop taking the medication in question.
2. For general symptoms: Antihistamines are given for skin rashes and itching. In some severe cases , corticosteroids may be given for a short period of time.
3. For breathing difficulties: Bronchodilators (similar to inhalers used by people with asthma) may be given to open the airways .
4. For Anaphylaxis: This is an emergency. For this, an injection called Epinephrine is given. After that, you must be hospitalized and kept under observation.
Sometimes, if you are allergic to a very important medicine like penicillin and there is no other option, doctors will perform a process called desensitization . This involves starting with a very small dose and gradually increasing the dose to get your body used to the medicine. This is done only in a hospital, under the supervision of specialist doctors.
If I have a drug allergy, how should I prepare?
If you know you have an allergy to a specific medicine, be sure to do these things.
- Remember the exact name of the medicine: Remember the brand name as well as the generic name of the chemical it contains.
- Inform every doctor: Whether you're a doctor, dentist, surgeon, or anyone you see, tell them about your allergy before starting treatment.
- Use an allergy card or bracelet: In case you are unable to speak in an emergency, it is a good idea to carry a card in your purse or wear a bracelet on your wrist so that others can know about your allergy.
- Know what to do in an emergency: If you have a severe allergy, your doctor may prescribe an emergency medication like an EpiPen . Always keep it with you and know exactly how to use it.
Take-Home Message
- Don't ignore any unusual symptoms you experience (itching, rash, difficulty breathing) after starting a new medication. Tell your doctor immediately.
- If you experience severe symptoms such as difficulty breathing, fainting, or facial swelling, it is an emergency. Go to the nearest hospital's Emergency Department (ETU) immediately.
- Don't forget to tell every doctor and dentist who treats you about your drug allergies.
- A side effect of a medication and a drug allergy are two different things. If you have any doubts about it, ask a doctor to find out for sure.
- It is very important for your safety to remember the exact name of your allergy medicine.


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