Do not take this medicine with any of the following medications:

-ramelteon
-viloxazine
This medicine may also interact with the following medications:

-alcohol
-certain medicines for blood pressure, heart disease, irregular heart beat like acebutolol, metoprolol, or propranolol
-certain medicines for fungal infections like ketoconazole
-fluvoxamine
-melatonin
-rifampin

They need to know if you have any of these conditions:

-liver disease
-smoke tobacco cigarettes
-an unusual or allergic reaction to tasimelteon, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Visit your health care provider for regular checks on your progress. It may be some time before you see the benefit from this medicine.
Limit your activities to preparing for bed after taking this medicine. You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand up or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.
Alcohol may interfere with the effects of this medicine. Avoid alcoholic drinks.
If you smoke, tell your health care provider if you notice this medicine is not working well for you. Talk to your health care provider if you decide to stop smoking.

Keep out of the reach of children and pets.
Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light and moisture. Keep the container tightly closed. Get rid of any unused medicine after the expiration date.
To get rid of medicines that are no longer needed or have expired:

-Take the medicine to a medicine take-back program. Check with your pharmacy or law enforcement to find a location.
-If you cannot return the medicine, check the label or package insert to see if the medicine should be thrown out in the garbage or flushed down the toilet. If you are not sure, ask your health care provider. If it is safe to put it in the trash, take the medicine out of the container. Mix the medicine with cat litter, dirt, coffee grounds, or other unwanted substance. Seal the mixture in a bag or container. Put it in the trash.