Investigations into fake online pharmacies have found harmful substances like lead-based paint, rat poison, and boric acid in place of the actual medicine.

Metronidazole (commonly known by the brand name Flagyl ) is a potent prescription antibiotic used to treat various bacterial and parasitic infections. While the convenience of online shopping might make buying it without a consultation seem appealing, doing so is illegal in most countries and carries significant health risks. Legal Status and Prescription Requirements

It is only available via prescription from a doctor or qualified clinician.

A medical consultation is essential because metronidazole can have severe side effects and dangerous interactions: About metronidazole - NHS