A client diagnosed with trigeminal neuralgia is experiencing intermittent, sudden, severe pain on the left side of the face. The nurse identifies which classification of medications is most effective in treating this pain.

Choice A reason: Decreasing bright lights is an appropriate action for a nurse to take when caring for a client who has signs of meningitis, as it helps to reduce the photophobia (sensitivity to light) and headache that are common symptoms of the condition. However, this action is not the first priority, as it does not prevent the transmission of the infection or treat the underlying cause.

Choice B reason: Initiating IV access is an appropriate action for a nurse to take when caring for a client who has signs of meningitis, as it facilitates the administration of fluids, medications, and blood products that may be needed to manage the condition. However, this action is not the first priority, as it does not prevent the transmission of the infection or treat the underlying cause.

Choice C reason: Administering antibiotics is an appropriate action for a nurse to take when caring for a client who has signs of meningitis, as it helps to treat the bacterial infection that is the most common cause of the condition. However, this action is not the first priority, as it requires a prescription from the health care provider and confirmation of the diagnosis by laboratory tests such as blood culture or cerebrospinal fluid analysis.

Choice D reason: Implementing droplet precautions is the first priority action for a nurse to take when caring for a client who has signs of meningitis, as it helps to prevent the spread of the infection to other clients and staff members. Droplet precautions are a type of isolation precautions that are used for infections that are transmitted by respiratory droplets, such as meningitis, influenza, and pertussis. Droplet precautions involve wearing a surgical mask when entering the client's room, placing the client in a private room or cohorting with other clients who have the same infection, and limiting visitors and staff contact with the client.

Choice A reason: Analgesics are medications that relieve pain by blocking pain signals or reducing inflammation. They include nonsteroidal anti-inflammatory drugs (NSAIDs), opioids, and acetaminophen. However, analgesics are not very effective in treating trigeminal neuralgia, as they do not address the underlying cause of the pain, which is the compression or irritation of the trigeminal nerve.

Choice B reason: Antihistamines are medications that block the effects of histamine, a chemical that causes allergic reactions such as itching, sneezing, and swelling. They include diphenhydramine, cetirizine, and loratadine. Antihistamines are not effective in treating trigeminal neuralgia, as they do not affect the trigeminal nerve or its function.

Choice C reason: Antibiotics are medications that kill or inhibit the growth of bacteria that cause infections. They include penicillin, amoxicillin, and ciprofloxacin. Antibiotics are not effective in treating trigeminal neuralgia, as they do not target the trigeminal nerve or its pathology.

Choice D reason: Anticonvulsants are medications that prevent or reduce the frequency and severity of seizures by stabilizing the electrical activity of the brain. They include carbamazepine, gabapentin, and phenytoin. Anticonvulsants are the most effective medications in treating trigeminal neuralgia, as they reduce the abnormal firing of the trigeminal nerve that causes the pain. Anticonvulsants are considered the first-line therapy for trigeminal neuralgia and can provide significant relief for most clients.