Final answer:
Penicillin V, amoxicillin, and ampicillin do not need dose adjustment in patients with renal failure.
Step-by-step explanation:
The penicillins that do not need dose adjustment in patients with renal failure are penicillin V, amoxicillin, and ampicillin. These oral penicillins are acid stable, meaning they can withstand the acidic pH of the stomach. Since they do not rely on renal excretion for elimination, they do not require dose adjustment in patients with renal failure.