Pitolisant is used to treat excessive daytime sleepiness caused by narcolepsy (a condition that causes excessive daytime sleepiness). Pitolisant is in a class of medications called H3 blockers. It works by changing the amounts of certain natural substances in the area of the brain that controls sleep and wakefulness.

Side Effects Of Pitolisant

Pitolisant may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • headache
  • difficulty falling asleep or staying asleep
  • nausea
  • stomach pain
  • loss of appetite
  • upper respiratory infection
  • muscle or joint pain
  • sleep talking, sleep terrors, or difficulty moving when sleeping or upon waking
  • muscle weakness that begins suddenly and lasts for a short time
  • rash
  • dry mouth
  • anxiety
  • irritability

Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately or get emergency medical treatment:

  • fast, pounding, or irregular heartbeat
  • fainting
  • hallucinating (seeing things or hearing voices that do not exist)

Pitolisant may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

Warnings & Precautions

Before taking pitolisant:

  • tell your doctor and pharmacist if you are allergic to pitolisant, any other medications, or any of the ingredients in pitolisant tablets. Ask your pharmacist for a list of the ingredients.
  • tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: amiodarone (Nexterone, Pacerone), antihistamines such as diphenhydramine and promethazine, carbamazepine (Carbatrol, Epitol, Tegretol), cyclosporine (Gengraf, Neoral, Sandimmune), bupropion (Aplenzin, Forvivo, Wellbutrin, in Contrave), chlorpromazine, clomipramine (Anafranil), disopyramide (Norpace), fluoxetine (Prozac, Sarafem, Selfemra, in Symbyax), imipramine (Tofranil), midazolam, mirtazapine (Remeron), moxifloxacin (Avelox), paroxetine (Paxil, Brisdelle, Pexeva), phenytoin (Dilantin, Phenytek), procainamide, rifampin (Rifadin, in Rifamate, in Rifater, Rimactane), quinidine (in Neudexta), sotalol (Betapace, Sorine, Sotylize), thioridazine, and ziprasidone (Geodon). Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Many other medications may also interact with pitolisant, so be sure to tell your doctor about all the medications you are taking, even those that do not appear on this list.
  • tell your doctor if you have liver disease. Your doctor may tell you not to take pitolisant.
  • tell your doctor if you have or have ever had a prolonged QT interval (a rare heart problem that may cause irregular heartbeat, fainting, or sudden death) or a fast, slow, or irregular heartbeat; and if you have low levels of magnesium or potassium in your blood; and if you have kidney disease.
  • you should know that pitolisant may decrease the effectiveness of hormonal contraceptives (birth control pills, patches, rings, implants, injections, and intrauterine devices). Use another form of birth control while taking pitolisant and for 21 days after you stop taking it. Talk to your doctor about types of birth control that will work for you during and after your treatment with pitolisant.
  • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking pitolisant, call your doctor.

Dosage Of Pitolisant

Pitolisant comes as a tablet to take by mouth. It is usually taken once a day with or without food as soon as you wake up in the morning. Take pitolisant at the same time every day. Do not change the time of day that you take pitolisant without talking to your doctor. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take pitolisant exactly as directed.

Your doctor will probably start you on a low dose of pitolisant and gradually increase your dose, not more than once every 7 days.

Pitolisant may decrease your sleepiness, but it will not cure your sleep disorder. It may take 8 weeks or longer before you feel the full benefit of pitolisant. Continue to take pitolisant even if you feel well-rested. Do not stop taking pitolisant without talking to your doctor.

Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient.


Keep all appointments with your doctor.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.


All information has been provided courtesy of MedLinePlus from the National Library of Medicine and from the FDA.