Alcohol may cause increased sedation or drowsiness, and increase the risk of having a seizure.

That drug, used first in lethal injection, causes sedation.

Benzodiazepines cause sedation, which can be either therapeutic or a side effect, depending on the patient's ailment.

Sceletium contains chemicals that are thought to work in the brain to cause sedation or sleepiness.

Other chemicals in skullcap are thought to cause sedation (drowsiness).

Some medicine used to treat hallucinations can cause sedation, confusion, and drops in blood pressure.

It also shares with most other anticonvulsants the tendency to cause sedation.

Together, these medicines may cause dangerous sedation, possibly resulting in unconsciousness or death.

Diphenhydramine can cause strong sedation and has also been used as an anxiolytic as a result.

It has anxiolytic and antipsychotic effects in animal studies, but without causing sedation.