Due to which side effect felbamate can be discontiuned?
**Core Concept**
Felbamate is an antiepileptic medication used in the treatment of partial seizures and generalized seizures. Its side effect profile includes hematological, hepatic, and renal toxicities, which can necessitate discontinuation of the drug.
**Why the Correct Answer is Right**
Felbamate is known to cause aplastic anemia and severe agranulocytosis, a potentially life-threatening hematologic side effect. This rare but serious condition can occur at any time during treatment, often without warning signs. The mechanism behind this toxicity is not fully understood, but it is thought to be related to the drug's ability to induce apoptosis in bone marrow cells.
**Why Each Wrong Option is Incorrect**
**Option A:** Hepatotoxicity is a known side effect of felbamate, but it is not the primary reason for discontinuation.
**Option B:** Renal insufficiency is not a commonly reported side effect of felbamate.
**Option C:** Weight gain is a possible side effect of felbamate, but it is not a reason for discontinuation.
**Clinical Pearl / High-Yield Fact**
Felbamate-induced aplastic anemia is a rare but serious side effect that can occur at any time during treatment, making regular monitoring of blood counts essential.
**Correct Answer: C.** Weight gain.