Tag: Atypical lymphocytes

In adults, a normal lymphocyte count is typically between 1,000 and 4,800 cells per microliter of blood [1.5.3, 1.5.5]. While infections are a common cause of elevated levels, a key question for many is: **can medications cause high lymphocytes?** The answer is yes, through several distinct mechanisms.

It is estimated that Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) syndrome has a mortality rate of up to 10%. This severe reaction often presents with elevated counts of **atypical lymphocytes**, indicating a critical need to understand the medications responsible.