Always read labels carefully to check the proper ... For example, though both medicines can cause side effects, Benadryl is more likely to cause side effects like extreme drowsiness.

That means some supplement products may not contain what the label says ... due to an increased risk of side effects like constipation and dizziness. If you take Benadryl, avoid other sedating ...

The human medication is used “off-label ... Monitor for side effects, and contact your vet immediately if you notice any serious issues. If Benadryl isn't suitable, discuss alternatives ...