What are common side effects associated with antiepileptic drugs?

Somnolence and gastrointestinal disturbances are indeed common side effects associated with antiepileptic drugs. These side effects can arise due to the way these medications affect neurotransmitter balances in the brain and their impact on the central nervous system.

Somnolence, or drowsiness, is particularly prevalent because many antiepileptic drugs have sedative properties, which can lead to decreased alertness and increased sleepiness. This can affect a patient's daily activities and overall quality of life.

Gastrointestinal disturbances, such as nausea, vomiting, or diarrhea, can occur due to the irritation of the gastrointestinal tract caused by these medications. Additionally, these side effects may lead to decreased adherence to treatment regimens if patients find the side effects intolerable.

The other options present side effects that are either uncommon or not typically associated with antiepileptic drugs. This context helps highlight why somnolence and gastrointestinal disturbances are accurately recognized as common reactions to this class of medication.