Which of the following is NOT true about the use of CNS stimulants for anorexia and narcolepsy?

CNS stimulants are designed to increase alertness and focus and are typically prescribed for conditions such as anorexia and narcolepsy. The recommended administration of these medications is primarily in the morning or earlier in the day to minimize the potential for insomnia. Taking them later in the day, especially after 6 PM, can interfere with sleep patterns and is generally advised against.

Therefore, the assertion that stimulants may be taken after 6 PM is not true, as it contradicts the guidelines aimed at preventing sleep disturbances. Options indicating the timing of administration, like taking them in the morning, are accurate and reflect best practices in managing the side effects associated with CNS stimulants. Additionally, the potential side effects such as insomnia are a well-documented concern that arises from their stimulatory effects on the central nervous system. The positive effects on focus and alertness are definite characteristics of these medications, further supporting the understanding of their uses and limitations.