Interferon Beta-1a

Common brands: Avonex, Rebif, Tysabri, Tecfidera, Ampyra

Top reporter: Biogen Inc.

Interferon beta [EPC]Integrin Receptor Antagonist [EPC]Nonsteroidal Anti-inflammatory Drug [EPC]Potassium Channel Blocker [EPC]gamma-Aminobutyric Acid-ergic Agonist [EPC]
191,752
Total Reports
21,708
Serious Reports
9,759
Death Reports
30
Reported Reactions
Death Report Ratio: High (5.09%)

Patient Demographics

Male
38,118
Female
150,491

Reported Adverse Reactions (30)

Side effects reported in FDA adverse event reports for Interferon Beta-1a.

# Reaction Reports % of Total
1 MULTIPLE SCLEROSIS RELAPSE 15,823
8.3%
2 INFLUENZA LIKE ILLNESS 13,243
6.9%
3 FATIGUE 11,538
6.0%
4 FALL 10,591
5.5%
5 MULTIPLE SCLEROSIS 9,333
4.9%
6 GAIT DISTURBANCE 8,911
4.7%
7 HEADACHE 8,410
4.4%
8 MEMORY IMPAIRMENT 7,986
4.2%
9 PAIN 7,739
4.1%
10 INJECTION SITE PAIN 6,318
3.3%
11 ASTHENIA 6,291
3.3%
12 HYPOAESTHESIA 5,555
2.9%
13 DEPRESSION 5,432
2.8%
14 MALAISE 5,098
2.7%
15 PAIN IN EXTREMITY 5,035
2.6%
16 PYREXIA 5,007
2.6%
17 DEATH 4,992
2.6%
18 DRUG INEFFECTIVE 4,969
2.6%
19 BALANCE DISORDER 4,890
2.6%
20 URINARY TRACT INFECTION 4,697
2.5%
21 ANXIETY 4,472
2.3%
22 NAUSEA 4,462
2.3%
23 DIZZINESS 4,255
2.2%
24 MUSCULAR WEAKNESS 4,082
2.1%
25 PNEUMONIA 3,870
2.0%
26 INJECTION SITE ERYTHEMA 3,782
2.0%
27 MOBILITY DECREASED 3,696
1.9%
28 TREMOR 3,650
1.9%
29 FEELING ABNORMAL 3,493
1.8%
30 CHILLS 3,451
1.8%

Important Disclaimer

FDA adverse event reports are submitted voluntarily and do not prove causation. A reported reaction does not mean the drug caused it. Drugs with more users naturally have more reports. Always consult your doctor or pharmacist before making medication decisions.