An "over-the-counter" medication (purchased without a prescription) is subject to the ordinary laws of "products liability." This means that a manufacturer can be held liable for personal injury
or property damage caused to a person due to a defect in design, manufacture, or warning of the product causing the injury.
A pet is considered "property" not "person" (though, most pet owners justifiably consider their pets members of the family). Regardless, if your pet was injured by a product which contained an insufficient warning of its dangers, then you can recover damages for the costs related to the pet's injury.
However, obtaining emotional damages for yourself, based upon the pet's injury is a different story. Plaintiffs cannot generally recover emotional damages for injuries caused to their spouse or child -- so recovering emotional damages based upon an injury to a pet is extraordinarily unlikely.
I don't know how much money is at stake here, but if your vet bills are $3,500 or less, then you can sue the manufacturer in small claims
court without a lawyer, and perhaps contact the local media about your situation, and you may end up receiving a settlement from the manufacturer just to keep you quiet about the product's dangers.
Typically, a plaintiff sends a demand letter before filing a lawsuit. So, you could contact the manufacturer, send the demand letter requesting reimbursement for your vet bills and any other associated costs, such as the cost of the product, travel too and from the vet, cleaning bills for the carpet, etc. And, if the manufacturer doesn't pay, then you file your lawsuit and let the judge decide if you have a valid products liability claim. You may not win, but you only risk your justice court filing fee, and if you win, then it was worth the gamble.
For info on justice court small claims in Mississippi, see this link
Note: If you spend more than $3,500, then you may want to contact a products liability attorney and see if someone is wiling to take the case on contingency. I can't promise that anyone would be interested, but you won't know unless you shop the case to at least three law firms. For a list of products liability attorneys in Mississippi, see this link.
Hope this helps.
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