A three-martini lunch also induces sleepiness.

A nice light snack can sometimes induce sleepiness.

Serotonin also induces sleepiness and is known to mediate depression.

Melatonin taken an hour or so before usual bedtime may induce sleepiness.

Although it is possible these may induce sleepiness if consumed in sufficient quantities, this is not well-studied.

Some sleep aids and herbal remedies may help induce sleepiness.

But they also slow down other brain activity, inducing sleepiness.

These lesions were also shown to induce sleepiness and adiposity.

Though having a glass of wine in the evening may induce sleepiness, drinking alcohol at night can cause wakefulness and fragmented sleep.

Replies: Milk, especially warm milk, contains the amino acid tryptophan, which is claimed by some to induce sleepiness.