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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.

Abnormal behaviour: Which Medications Cause It? (22,255 Reports Across 701 Drugs)

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Abnormal behaviour has been reported as an adverse event with 701 different drugs in the FDA's FAERS database, with 22,255 total reports. 1,080 of these reports resulted in death.The drugs most commonly associated with Abnormal behaviour are PIMAVANSERIN, ARIPIPRAZOLE, and METHYLPHENIDATE.

22,255
Total Reports
701
Drugs Involved
1,080
Deaths
6,580
Hospitalizations
41.9 yrs
Average Patient Age
45.3% / 54.7%
Female / Male

Which Drugs Cause Abnormal behaviour Most Often?

Drug Reports % of Drug Reports Deaths Hosp. Life-Threat.
PIMAVANSERIN 1,364 2.9% 207 295 5
ARIPIPRAZOLE 903 1.4% 22 467 60
METHYLPHENIDATE 779 2.5% 1 70 7
MONTELUKAST 672 2.5% 8 61 40
LEVETIRACETAM 655 1.1% 3 236 26
RISPERIDONE 642 0.8% 33 277 35
QUETIAPINE 612 0.8% 43 372 41
OLANZAPINE 530 1.0% 23 284 58
OXYCODONE 486 0.3% 127 146 9
DULOXETINE 483 0.9% 12 184 14
ZOLPIDEM 478 2.2% 21 67 21
PALIPERIDONE 476 1.2% 15 181 7
CLOZAPINE 467 0.5% 22 320 21
SERTRALINE 453 0.8% 25 145 71
CLONAZEPAM 421 1.1% 20 222 27
PREGABALIN 413 0.4% 36 122 23
CARBIDOPA\LEVODOPA 397 0.7% 32 233 9
OSELTAMIVIR 386 3.3% 8 53 11
GABAPENTIN 342 0.5% 17 114 12
LORAZEPAM 311 0.9% 38 137 25

View all 701 drugs →

Top 3 Drugs Associated With Abnormal behaviour

1,364 reports
903 reports
779 reports

Related Side Effects

Drug ineffective (1,049,718) Off label use (762,782) Death (660,423) Fatigue (599,248) Nausea (562,301) Diarrhoea (491,550) Pain (471,975) Headache (460,069) Dyspnoea (409,496) Dizziness (352,922)