dr. chirawat chiewchalermsri
Specialist in adult allergy, asthma, and drug/food allergy with valuable research and immunotherapy expertise; committee member of the Thai Asthma Council.

Specialist in adult allergy, asthma, and drug/food allergy with valuable research and immunotherapy expertise; committee member of the Thai Asthma Council.


Drug allergy is a reaction in which the immune system responds abnormally to a medication. It can occur in both acute and non-acute forms. If not clearly diagnosed, it may lead to missing out on necessary medications in the future and pose a risk of severe danger. This article summarizes symptoms, causes, diagnostic methods, and safe management strategies.

Regardless of the season, when the weather changes – unpredictably sunny, rainy or cold – it can trigger your allergies.


PM 2.5 are polluted particles in the air that are extremely small. Once you inhale these particles deep into your bronchial tract, your trachea and alveoli (air sac) will become inflamed. This will be very harmful to your respiratory system, and even worsen the conditions in allergy patients.