Possible Side Effects

Parents and caregivers often notice their child is irritable when they are on Acthar. Although it can be very upsetting, the irritability itself isn’t harmful to your child. Also, if irritability occurs, do not mistake it as a sign that the medication isn’t working. In addition to irritability, appetite changes and weight gain are commonly noticed with Acthar but are not considered harmful. These side effects of the medication will likely disappear after your child completes Acthar therapy.

The most common side effects of Acthar in infants include: infections, increased blood pressure, irritability and changes in behavior, changes in appetite and weight, diarrhea, and vomiting. Other adverse reactions reported in adults and children over 2 years of age included: abdominal bloating, anxiety, asthma, chest discomfort, congestive heart failure, dizziness, shortness of breath, redness of the face, fluid retention, flushing, headache, injection site pain, tiredness, muscle weakness, nervousness, rapid heart rate, and lack of energy. Tell your doctor if there is any side effect that bothers you or your child or that does not go away.

Your doctor may also choose to monitor your child and perform additional tests. Before starting Acthar, tell your doctor if your child has an infection or signs of an infection such as:

  • Fever
  • Cough
  • Vomiting
  • Diarrhea
  • Other signs of illness or flu

These are not all of the possible side effects of Acthar. Please see the Acthar Medication Guide for more information. You may also ask your doctor, nurse or pharmacist, or call 1-800-465-9217. You may report side effects to the FDA at 1-800-FDA-1088.