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Important: This site presents data from the FDA Adverse Event Reporting System (FAERS). A report does not mean the drug caused the event. Full disclaimer.

Monoclonal [CS] — Common Side Effects

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Side Effect Total Reports Drugs Deaths Hosp. Life-Threat.
Drug ineffective 101,803 15 2,295 13,654 2,484
Injection site pain 67,874 8 69 2,628 51
Pruritus 58,842 15 1,471 4,495 1,403
Arthralgia 57,348 14 2,029 10,134 2,132
Rash 56,568 15 2,320 6,991 2,432
Pain 51,941 15 2,243 11,642 2,564
Fatigue 49,544 15 2,792 10,271 2,468
Off label use 39,612 15 3,805 8,040 3,063
Product use in unapproved indication 37,993 15 1,651 3,784 1,489
Wrong technique in product usage process 34,427 9 18 1,022 17
Headache 34,390 14 2,071 7,037 1,856
Dermatitis atopic 33,792 5 27 610 17
Device difficult to use 32,503 4 15 607 17
Condition aggravated 31,661 15 1,848 5,967 2,047
Rheumatoid arthritis 30,436 10 2,088 6,584 2,304
Nausea 30,417 15 1,973 8,796 1,935
Diarrhoea 30,195 15 2,603 10,305 2,211
Covid-19 30,122 14 1,027 6,124 266
Pain in extremity 28,295 15 1,228 6,034 1,246
Dyspnoea 28,137 15 2,346 9,132 1,854
Accidental exposure to product 27,513 6 18 356 9
Incorrect dose administered 25,075 9 46 1,033 25
Nasopharyngitis 24,954 14 1,528 4,432 1,640
Drug dose omission by device 24,655 4 8 340 9
Malaise 24,269 15 2,149 7,946 1,793
Pyrexia 23,701 15 2,222 10,130 1,901
Dry skin 23,120 12 87 957 32
Death 23,015 15 22,856 2,132 371
Pneumonia 22,006 15 3,276 12,720 1,998
Cough 21,775 14 439 3,692 203
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