Violation
Which of the following penicillins is most effective against Gram-negative organisms?
Penicillin V.
Phenethicillin.
Methicillin.
Nafcillin.
Ampicillin.
Which of the following penicillins is most effective against Gram-negative organisms?
Penicillin V.
Phenethicillin.
Methicillin.
Nafcillin.
Ampicillin.