Amoxicillin/Clavulanic Acid-induced thrombocytopenia

Area of Science:

• Pharmacology
• Hematology
• Clinical Medicine

Background:

• Drug-induced thrombocytopenia is a frequent adverse drug event.
• Penicillin-induced thrombocytopenia is typically mediated by antibodies.
• Amoxicillin/clavulanic acid is a commonly prescribed antibiotic.

Purpose of the Study:

• To report a case of thrombocytopenia induced by amoxicillin/clavulanic acid.
• To highlight a unique presentation of drug-induced thrombocytopenia in an outpatient setting.

Main Methods:

• A case study of a 23-year-old male presenting with bruising after antibiotic use.
• Diagnosis of amoxicillin/clavulanic acid-induced thrombocytopenia through exclusion.
• Treatment with a corticosteroid taper regimen.

Main Results:

• The patient presented with bruising, not overt bleeding.
• Platelet count increased after discontinuation of the suspected drug and treatment.
• The Naranjo scale indicated a probable adverse event.

Conclusions:

• Amoxicillin/clavulanic acid is a probable cause of thrombocytopenia in this case.
• This case is unique due to the outpatient setting, absence of bleeding, and lack of other medications.
• Further investigation may be needed to elucidate the exact mechanism.