Lactulose is ordered for a patient with liver disease. What would indicate the medication is exerting a positive therapeutic effect on the patient?

A. Before breakfast or lunch

Methylphenidate (Ritalin), a stimulant medication commonly used to treat attention deficit hyperactivity disorder (ADHD), is usually administered before breakfast or lunch for maximum effectiveness. This schedule helps align the peak concentration of the medication with the times when increased focus and attention are often needed, such as during school hours.

B. With meals

While it can be administered with meals, the goal is often to have the medication take effect before meals to help with focus and attention during activities like school or work.

C. After dinner

Administering methylphenidate after dinner may interfere with the patient's ability to fall asleep, as the medication can cause insomnia. It is generally recommended to avoid administering it in the late afternoon or evening.

D. At bedtime

Administering methylphenidate at bedtime is not appropriate due to the potential for insomnia. The stimulant effect of the medication is not aligned with the patient's sleep-wake cycle.

A. Depression:

CNS stimulants are generally not indicated for depression. In fact, they can exacerbate symptoms and are not considered a first-line treatment for depressive disorders.

B. Opiate overdose:

CNS stimulants are not indicated for treating opiate overdose. In cases of overdose, other medications like naloxone are commonly used to reverse the effects of opioids.

C. Poor appetite:

CNS stimulants may be used to increase alertness and decrease fatigue, but they are not typically prescribed to address poor appetite. Appetite stimulation is often managed through other approaches.

D. Narcolepsy:

This is the correct answer. CNS stimulants, such as modafinil or methylphenidate, are commonly prescribed to manage symptoms of narcolepsy. These medications help improve wakefulness and reduce excessive daytime sleepiness.