Adverse reactions to drugs are very common in everyday medical practice. Adverse drug reaction (ADR) is defined as any noxious, unintended and undesired effect to a drug that is administrated in standard doses by the proper route for the purpose of prophylaxis, diagnosis, or treatment . Some drug reactions may occur in everyone whereas others occur only in susceptible patients. These are factors that may impact on clinical practice. Asthmatics have a greater risk of developing ADRs. The majority of asthma patients are atopic. The most common drugs that induce ADRs in asthmatics are: aspirin and non-steroidal anti–inflammatory agents. Avoidance of a drug responsible for adverse reactions is the most important to prevent ADRs .
Key words: adverse drug reaction, bronchial asthma
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