A nurse is reviewing the list of current medications for a client who is to start a new prescription for carbamazepine.
The nurse should identify which of the following medications interacts with carbamazepine?

Carbamazepine is an anticonvulsant medication that is used to treat seizures and nerve pain. It works by reducing the activity of certain nerve cells in the brain.

Choice A is wrong because beclomethasone is a corticosteroid that is used to treat asthma and allergic rhinitis. It does not interact with carbamazepine.

Choice B is correct because the estrogen-progestin combination is a hormonal contraceptive that is used to prevent pregnancy and regulate menstrual cycles. It interacts with carbamazepine because carbamazepine can increase the breakdown of estrogen and progestin in the body, making them less effective. The nurse should instruct the client to use an alternative or additional method of birth control while taking carbamazepine.

Choice C is wrong because diphenhydramine is an antihistamine that is used to treat allergies, motion sickness, and insomnia. It does not interact with carbamazepine.

Choice D is wrong because the nicotine transdermal system is a nicotine replacement therapy that is used to help people quit smoking. It does not interact with carbamazepine.

Drowsiness is a very common adverse effect of paroxetine, a selective serotonin reuptake inhibitor (SSRI) used to treat depression and anxiety. Paroxetine can cause somnolence (sleepiness) in up to 22% of patients who take it. The nurse should instruct the client to monitor for this effect and avoid driving or operating machinery until they know how the medication affects them.

Choice A is wrong because tinnitus (ringing in the ears) is not a common adverse effect of paroxetine.

It may occur rarely in some patients, but it is not a typical symptom of SSRI use.

Choice B is wrong because alopecia (hair loss) is not a common adverse effect of paroxetine.

It may occur rarely in some patients, but it is not a typical symptom of SSRI use.

Choice C is wrong because peripheral edema (swelling of the limbs) is not a common adverse effect of paroxetine.

It may occur rarely in some patients, but it is not a typical symptom of SSRI use.