Pallett says such prophylactic use of the drugs, though unavoidable, can “add fuel to the fire” by promoting the evolution and spread of genes for drug resistance.

Section 143 states "the regulations may impose a special restriction or requirement such as requiring a person to be vaccinated or to receive other prophylactic treatments".

What they found was that it didn't matter whether the patient was treated with prophylactic antibiotics or not when it came to rates of post-operative infection.

Thirty minutes after the single dose of alcohol, the prophylactic application of the gel reduced the alcohol level in the mice by 40 percent.

Authorized by the FDA for emergency use, it’s given prophylactically and can help recipients prevent COVID-19 if they are later exposed to an infected person.