Lethargy after Diphenhydramine in cats
118 reports to the FDA describe lethargy in cats given Diphenhydramine. That is 32% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.
118Reports
65%Marked serious
31%Recovered
21%Died or euthanised
Same dayTypical onset
Sponsored
How soon it started
How the animals did
Problems reported at the same time
Age of the animals
About this medicine
Type: medicine.
Questions owners ask
- Can Diphenhydramine cause lethargy in cats?
- 118 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
- How soon after a dose was it reported?
- In half of the reports with dates, it started within the same day of the first dose.
- What should I do?
- Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).
Lethargy with similar medicines
- Lethargy after Ketamine 244 reports · 7.5% of its reports
- Lethargy after Butorphanol 275 reports · 12% of its reports
- Lethargy after Isoflurane 248 reports · 12% of its reports
- Lethargy after Tiletamine + Zolazepam 110 reports · 6.6% of its reports
- Lethargy after Methylprednisolone 368 reports · 23% of its reports
- Lethargy after Propofol 156 reports · 13% of its reports
- Lethargy after Atipamezole 95 reports · 9.2% of its reports
- Lethargy after Midazolam 111 reports · 15% of its reports
- Lethargy after Florfenicol + Mometasone + Terbinafine 106 reports · 15% of its reports
- Lethargy after Orbifloxacin 111 reports · 16% of its reports
All reported side effects of Diphenhydramine in cats · Medicines most reported with lethargy