Ingredients / Zolazepam
Zolazepam: FDA adverse event reports for pets Reports received through June 26, 2026. Data and limitations .
3,745 Total reports
1,539 Dog reports
1,766 Cat reports
These are reports sent to FDA. A report does not prove that the product caused the problem: the animal may have had another illness, been given other products, or the event may have happened by chance. Counts depend on how widely a product is used and how often people report, so they cannot be used to compare products or estimate risk. Talk to your veterinarian before starting, stopping or changing any medication.
“An API dataset query result cannot be used to estimate the risk associated with the product or compare one drug or device product with another...”
FDA, openFDA FDA-approved products with this ingredient (Green Book) All approved products with this ingredient, for any species.
Telazol® (Zoetis Inc.) Tzed™ (Dechra Veterinary Products LLC) ZOLETIL® (Virbac AH, Inc.) Brand names come only from the Green Book. Brand names in FDA's public report data are masked, so counts cannot be attributed to any brand. Ingredient names in the reports are written many ways; we group them under one ingredient name and count each report once per ingredient (method ).
Reports by year received 1988 18
1989 57
1990 49
1991 59
1992 61
1993 115
1994 94
1995 114
1996 120
1997 139
1998 124
1999 110
2000 109
2001 90
2002 105
2003 143
2004 119
2005 94
2006 112
2007 106
2008 85
2009 115
2010 110
2011 103
2012 139
2013 120
2014 108
2015 139
2016 129
2017 76
2018 105
2019 93
2020 71
2021 80
2022 84
2023 76
2024 69
2025 69
2026 36
Species named in reports Cat 1,766
Dog 1,539
Not given 260
Other 83
Human 35
Pig 16
Other Deer 8
Primate 7
Signs reported after Zolazepam Death 834
INEFFECTIVE, ANESTHESIA 420
Lack of efficacy - NOS 364
Recovery prolonged 361
Cardiac arrest 290
Apnoea 280
Fever 268
Ataxia 265
Hyperexcitation 151
Death by euthanasia 151
Vomiting 148
Vocalisation 142
Depression 138
Lung oedema 133
Dyspnoea 130
Cyanosis 127
Anorexia 125
Hypothermia 112
Convulsion 103
Unrelated death 94
Bradycardia 93
INEFFECTIVE, SEDATION 83
Solution, Abnormal 80
Blindness 68
Nystagmus 68
Breeds named in reports Domestic (unspecified) 786
Cat (unknown) 418
Dog (unknown) 381
Domestic Shorthair 244
Retriever - Labrador 128
Crossbred Canine/dog 125
Mixed (Dog) 118
Cat (other) 67
Shepherd Dog - German 58
Mixed (Cat) 51
Rottweiler 41
Retriever - Golden 39
Domestic Longhair 39
Chow Chow 37
Persian 36
Reported outcomes Died 940
Recovered/Normal 553
Ongoing 201
Euthanized 191
Outcome Unknown 119
Recovered with Sequela 4
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