Caplacizumab-yhdp Injection


Caplacizumab-yhdp injection is used to treat acquired thrombotic thrombocytopenic purpura (aTTP; a disorder in which the body attacks itself and causes clots, low amounts of platelets and red blood cells, and could cause other serious complications) in combination with plasma exchange therapy and immunosuppressant medications. Caplacizumab-yhdp is in a class of medications called antithrombotic agents. It works by blocking the action of a certain substance in the body that causes the symptoms of aTTP.

Side Effects Of Caplacizumab-yhdp Injection

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

  • headache
  • extreme tiredness
  • back pain
  • muscle pain
  • tingling, prickling, or numb feeling on the skin
  • itching near the spot the medication was injected
  • shortness of breath
  • fever

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

  • hives
  • heavy bleeding that won’t stop including bleeding from rectum, vagina, nose, gums or place where the medication was injected
  • vomiting blood
  • red, or black, tarry stools
  • blood in urine
  • sudden severe headache, nausea, vomiting
  • sudden, sharp abdominal pain, nausea, vomiting
  • frequent, painful, or urgent urination

Caplacizumab-yhdp injection may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

Warnings & Precautions

Before receiving caplacizumab-yhdp:

  • tell your doctor and pharmacist if you are allergic to caplacizumab-yhdp, any other medications, or any of the ingredients in caplacizumab-yhdp injection. Ask your pharmacist for a list of the ingredients.
  • tell your doctor and pharmacist what 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: apixaban (Eliquis), clopidogrel (Plavix), dabigatran (Pradaxa), dipyrimadole (Persantine, in Aggrenox), edoxaban (Savaysa), enoxaparin (Lovenox), fondaparinux (Arixtra), heparin, prasugrel (Effient), rivaroxaban (Xarelto), ticagrelor (Brilinta), or warfarin (Coumadin, Jantoven). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
  • tell your doctor if you have or have ever had hemophilia (a genetic disorder in which the body can’t stop bleeding properly) or other bleeding problems, or liver disease.
  • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while receiving caplacizumab-yhdp, call your doctor.
  • if you are having surgery, including dental surgery, tell the doctor or dentist that you are using caplacizumab-yhdp. Your doctor or dentist may tell you not to use caplacizumab-yhdp for 7 days before the surgery.

Dosage Of Caplacizumab-yhdp Injection

Caplacizumab-yhdp comes as a powder to be dissolved in liquid and given by intravenous (into the vein) or subcutaneous (under the skin) injection. It is usually given on the first day of treatment as an intravenous injection at least 15 minutes before plasma exchange, and then again as a subcutaneous injection after plasma exchange is finished. After the first day of treatment it is usually given as a once daily subcutaneous injection following plasma exchange for as long as you receive plasma exchange therapy, and then once daily for an additional 30 to 58 days after stopping plasma exchange therapy. Use caplacizumab-yhdp at around the same time every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use caplacizumab-yhdp exactly as directed. Do not use more or less of it or use it more often than prescribed by your doctor.

Your doctor may allow you or a caregiver to perform the injections at home. Ask your doctor or pharmacist to show you or the person who will be performing the injections how to prepare and inject caplacizumab-yhdp. Before you use caplacizumab-yhdp injection yourself for the first time, read the written instructions that come with it. Ask your pharmacist or doctor for a copy of the manufacturer’s instructions for use information for the patient.
You should inject caplacizumab-yhdp injection subcutaneously in the abdominal (stomach) area but avoid your navel and the area 2 inches (5 centimeters) around it. Do not inject in the same spot two days in a row.

Dispose of used needles, syringes, and vials in a puncture-resistant container. Talk to your doctor or pharmacist about how to dispose of the puncture-resistant container.


Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check if treatment with caplacizumab-yhdp should be continued.

Do not let anyone else use your medication. Ask your pharmacist any questions you have about refilling your prescription.

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.