What is Tyvaso?

Treprostinil inhalation is used to treat the symptoms of pulmonary arterial hypertension (PAH). This is the high blood pressure that occurs in the main artery that carries blood from the right side of the heart (the ventricle) to the lungs. When the smaller blood vessels in the lungs become more resistant to blood flow, the right ventricle must work harder to pump enough blood through the lungs. Treprostinil works by blocking a hormone (a naturally occurring substance), that is found in the blood and lungs in large quantities of the people with pulmonary arterial hypertension. Treprostinil helps by increasing the supply of blood to the lungs and reducing the workload of the heart. It may also improve the exercise ability in patients with PAH.

This medicine is available only with your doctor's prescription.

Treprostinil inhalation should be taken when you wake up and also before any physical activity, but not more than every 4 hours. Do not change your dose without talking to your doctor.

Treprostinil is breathed into your lungs with Tyvaso® Inhalation System. This system consists of the Tyvaso® Inhalation System device and its accessories. Carefully follow your doctor's instructions for using the medicine and operating and cleaning the equipment. Do not put other medicines into this equipment.

Do not drink this medicine. Do not allow the inhalation solution to come into contact with your skin or eyes. If it does, rinse it off with water right away.

To avoid missing a dose or any possible problems with the drug delivery device you are using, you should have a back-up with Tyvaso® Inhalation System device.

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

• For inhalation dosage form (solution):
  • For pulmonary arterial hypertension:
    • Adults—At first, 18 micrograms (mcg) or three breaths, per treatment session at least 4 hours apart, 4 times a day. Each treatment session will take 2 to 3 minutes. Your doctor may adjust your dose as needed and tolerated. However, the dose is usually not more than 9 breaths per treatment session, 4 times a day.
    • Children—Use and dose must be determined by your doctor.

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Protect the medicine from direct light. Keep your medicine in the unopened foil pouch until you are ready to use it. Once the foil pack is opened, the ampules should be used within 7 days.

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Appropriate studies have not been performed on the relationship of age to the effects of treprostinil inhalation in the pediatric population. Safety and efficacy have not been established.

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of treprostinil inhalation in the elderly. However, elderly patients are more likely to have age-related liver, kidney, or heart problems which may require caution and an adjustment in the dose for patients receiving treprostinil inhalation.

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

• Defibrotide

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

• Aceclofenac
• Acemetacin
• Alipogene Tiparvovec
• Alteplase, Recombinant
• Amtolmetin Guacil
• Anagrelide
• Apixaban
• Ardeparin
• Argatroban
• Aspirin
• Bemiparin
• Betrixaban
• Bivalirudin
• Bromfenac
• Bufexamac
• Celecoxib
• Certoparin
• Choline Salicylate
• Citalopram
• Clonixin
• Dabigatran Etexilate
• Dalteparin
• Danaparoid
• Desirudin
• Dexibuprofen
• Dexketoprofen
• Diclofenac
• Diflunisal
• Dipyridamole
• Dipyrone
• Droxicam
• Edoxaban
• Enoxaparin
• Eptifibatide
• Escitalopram
• Etodolac
• Etofenamate
• Etoricoxib
• Felbinac
• Fenoprofen
• Fepradinol
• Feprazone
• Floctafenine
• Flufenamic Acid
• Fluoxetine
• Flurbiprofen
• Fluvoxamine
• Fondaparinux
• Heparin
• Ibrutinib
• Ibuprofen
• Indomethacin
• Ketoprofen
• Ketorolac
• Lepirudin
• Levomilnacipran
• Lornoxicam
• Loxoprofen
• Lumiracoxib
• Meclofenamate
• Mefenamic Acid
• Meloxicam
• Morniflumate
• Nabumetone
• Nadroparin
• Naproxen
• Nepafenac
• Niflumic Acid
• Nimesulide
• Nimesulide Beta Cyclodextrin
• Oxaprozin
• Oxyphenbutazone
• Parecoxib
• Parnaparin
• Paroxetine
• Phenindione
• Phenprocoumon
• Phenylbutazone
• Piketoprofen
• Piracetam
• Piroxicam
• Pixantrone
• Proglumetacin
• Propyphenazone
• Proquazone
• Protein C
• Reviparin
• Rivaroxaban
• Rofecoxib
• Salicylic Acid
• Salsalate
• Sertraline
• Sodium Salicylate
• Sulindac
• Tenoxicam
• Tiaprofenic Acid
• Ticagrelor
• Tinzaparin
• Tolfenamic Acid
• Tolmetin
• Valdecoxib
• Vilazodone
• Vortioxetine
• Warfarin

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

• Asthma or
• Bleeding problems or
• Chronic obstructive pulmonary disease (COPD) or
• Hypotension (low blood pressure) or
• Lung infection—Use with caution. May make these conditions worse.

• Kidney disease or
• Liver disease—Use with caution. Effects may be increased because of slower removal of the medicine from the body.

It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

It is very important that your doctor check your blood pressure regularly while you are taking this medicine. You may also need to monitor your blood pressure at home. If you notice any changes to your recommended blood pressure, call your doctor right away.

This medicine may make you dizzy, lightheaded, or faint. Do not drive or do anything else that could be dangerous until you know how this medicine affects you. Standing up slowly from a sitting or lying position can help.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements. Your doctor may adjust the doses of all the medicines you are taking or monitor you carefully for side effects.