What class of drugs helps reduce anxiety and can induce sleep?

The class of drugs that helps reduce anxiety and can induce sleep is hypnotics. Hypnotics are specifically designed to promote sleep and are often prescribed for individuals experiencing insomnia or other sleep disorders. They work by increasing the activity of neurotransmitters in the brain that facilitate relaxation and sedation, making it easier to fall asleep.

While sedatives also induce calmness and can help with anxiety, the term "hypnotics" is more frequently associated with medications that specifically promote sleep in addition to their anxiolytic effects. Hence, hypnotics serve a dual purpose; they can reduce anxiety levels while also inducing sleep, making them a suitable choice for individuals struggling with both conditions. The other options listed do not fulfill this dual function as directly. Psycho-stimulants typically increase alertness and energy levels, while diuretics are primarily used to promote the excretion of fluids and do not have effects related to anxiety or sleep.