Carbapenem with maximum risk of seizures is:
**Core Concept**
The question is testing the knowledge of carbapenem antibiotics and their side effects, specifically the risk of seizures. Carbapenems are a class of broad-spectrum beta-lactam antibiotics that are effective against a wide range of Gram-positive and Gram-negative bacteria.
**Why the Correct Answer is Right**
One of the known side effects of carbapenems is the risk of seizures, particularly with high doses or rapid infusion. This is due to the accumulation of the antibiotic in the central nervous system (CNS) and its effect on the GABA (gamma-aminobutyric acid) receptor, leading to excessive neuronal excitability and seizures. This is more likely to occur with imipenem, a carbapenem that is metabolized by the enzyme dehydropeptidase-I, which is not present in the CNS.
**Why Each Wrong Option is Incorrect**
* **Option A:** Imipenem is not the only carbapenem with a risk of seizures, but it is the one with the highest risk due to its metabolism and penetration into the CNS.
* **Option B:** Meropenem has a lower risk of seizures compared to imipenem, as it is less likely to accumulate in the CNS and has a more favorable pharmacokinetic profile.
* **Option C:** Doripenem has a similar risk of seizures to imipenem, but it is not as well-studied in this regard.
* **Option D:** Ertapenem is a carbapenem with a long half-life and a lower risk of seizures due to its pharmacokinetic properties.
**Clinical Pearl / High-Yield Fact**
To minimize the risk of seizures when using carbapenems, it is essential to use the recommended dosing and infusion rates, and to monitor patients for signs of CNS toxicity, such as seizures or altered mental status.
**Correct Answer: C. Doripenem has a similar risk of seizures to imipenem, but it is not as well-studied in this regard.**