The Medicines and Healthcare products Regulatory Agency (MHRA) have announced that in the past five years, officials have seized more than £34m worth of medicine supplied illegally.
A group of health organisations have launched the Real Danger campaign to raise awareness about the risks of buying prescription medicines online through unregulated channels without a prescription.
Officials warned that unlicensed or fake medicines could contain harmful ingredients such as arsenic and could potentially be lethal.
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His mother Princess Diana was killed in a car crash in Paris in 1997 when he was just 12 and his brother William was 15.
The 21-year-old, who was arrested on Sunday, also allegedly injured two other people in the attack in the German city of Reutlingen.
She was going to the aid of a family member who got out of the car in the middle of the park and was dragged away by a different tiger.