Brief Answer:
Heparin, Aspirin, Allopurinol cause increase in count

Detailed Answer:
Hello thanks for asking from HCM

A lot of commonly used medicines result in drop in WBC counts. Commonly used drugs as Clozapine (antipsychotic), Lamotrigine, Sodium Valproate (mood stabiliser), anti cancer drugs, steroids, drugs used in autoimmune disorders as Tacrolimus, Sirolimus, Mycophenolate etc, antibiotics as some chlorophenicholes, Minocycline, Metronidazole, Sulfonamides, Barbiturates, Arsenic compounds, Captopril etc are known to reduce the counts.

To increase the counts drugs as Heparin, Aspirin, Allopurinol, Lithium etc are utilised.

Thanks, hope this list helps you. Still if you want to know about a particular drug please mention the name so that I can comment with certainty.

Thanks, take care

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