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Common Side Effects

Panitumumab has been studied extensively in clinical trials. In these studies, the side effects that occurred in a group of people who received panitumumab were carefully documented and compared to the side effects that occurred in a similar group of people who did not receive panitumumab. As a result, it was possible to see what side effects occurred and how often they appeared.
 
In these studies, the most common panitumumab side effects included:
 
  • Skin reactions -- in up to 90 percent of people
  • Low blood magnesium levels (hypomagnesemia) -- up to 38 percent
  • Fatigue -- up to 26 percent
  • Infections around the toenails and fingernails -- up to 25 percent
  • Abdominal (stomach) pain -- up to 25 percent
  • Nausea -- up to 23 percent
  • Diarrhea -- up to 21 percent
  • Constipation -- up to 21 percent
  • Vomiting -- up to 19 percent.
 
Other common side effects, occurring in 3 percent to 15 percent of people, included but were not limited to:
 
  • Eye problems, such as:
 
    • Inflammation
    • Redness
    • Tearing
    • Irritation
 
  • Cough
  • Swelling of the arms, hands, legs, ankles, and feet
  • Sores and inflammation of the mouth
  • Problems with the toenails or fingernails
  • Growth of hair and eyelashes
  • Reactions to the infusion.
 
The majority of people in clinical trials experienced a skin reaction of some type, usually within the first two weeks of starting treatment. Reported reactions included:
 
  • Redness
  • An acne-like rash
  • Other rashes
  • Itching
  • Peeling skin
  • Cracking skin
  • Dry skin.
 
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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