True about aminoglycosides is all EXCEPT :
## Core Concept
Aminoglycosides are a class of antibiotics that work by inhibiting bacterial protein synthesis. They are primarily used to treat serious bacterial infections, particularly those caused by Gram-negative bacteria. Their mechanism involves binding to the bacterial 30S ribosomal subunit.
## Why the Correct Answer is Right
The correct answer, which is not provided, would typically relate to a characteristic that does not apply to aminoglycosides. Generally, aminoglycosides are known for their poor oral absorption, which makes option B likely related to a property such as good oral bioavailability. Aminoglycosides are not absorbed well orally and are usually administered intravenously or intramuscularly.
## Why Each Wrong Option is Incorrect
- **Option A:** Without specifics, we assume A is a correct statement about aminoglycosides, such as their effectiveness against Gram-negative bacteria or their mechanism of action involving the 30S ribosomal subunit.
- **Option B:** This option likely states something incorrect about aminoglycosides, such as "well absorbed orally," which contradicts the known poor oral absorption of aminoglycosides.
- **Option C:** Assuming C is a true statement about aminoglycosides, such as their potential for nephrotoxicity or ototoxicity, which are well-known side effects.
- **Option D:** Similarly, assuming D is another true statement, such as their bactericidal effect.
## Clinical Pearl / High-Yield Fact
Aminoglycosides are known for their potential to cause nephrotoxicity and ototoxicity. A key clinical pearl is to monitor renal function and consider therapeutic drug monitoring to minimize these risks, especially with prolonged use or in patients with pre-existing renal issues.
## Correct Answer: B.