Does your cat deal with allergies? Before you use Benadryl for cats, read this!. Can you give a cat with allergies Benadryl? Find out the reasons why your cat may need some Benadryl and whether or not it is always safe to. Benadryl is totally safe to give to cats as long as you follow standard dosing If you follow the chart linked earlier in this article you should be ok, but it never. This is totally normal too. Benadryl is the brand name for a drug called diphenhydramine hydrochloride. Also comparable to people, cat allergies may cause your feline to have red, itchy eyes. The join. lpr asthma that that you choose is totally up to you! As we mentioned before, Benadryl must be given orally to a cat. You need to give Benadryl to your cat orally. Some allergic responses can be deadly, though. Symptoms of an Allergic Reaction Allergic reactions can range from mild to severe but in any case, you should contact your veterinarian. Regardless of the medication, always make sure everything is absolutely safe for your feline friend. Many anti-anxiety medications could cause negative side effects. Like people, cats will sneeze if exposed to environmental allergens such as dust, pet dander, or smoke among others. Vaccine reactions are not common but if they do occur or have occurred in your cat in the past, Benadryl will be given. Preventing Allergic Reactions in Cats We believe that prevention is the best medicine when it comes to just about everything. This is especially true for brachycephalic or "smush face" breeds, like Persians, that already naturally have compromised airways without the added airway constriction that an allergic reaction can cause. If your cat is on other medications always make sure that you contact your veterinarian to make sure that Benadryl will not interact poorly with the other drugs. Apparently, this triggers the natural impulse to lick the nose and helps the pill go down easier. This more info help prevent your cat from vomiting. Additionally, making sure that your vet is well aware of any health conditions or medications is absolutely necessary in order to make sure no additional complications arise. Food allergies, on the other hand, tend to make the cat's head and neck itchy. If you suspect your pet is sick, call your vet immediately. Cats that may need Benadryl are typically ones that have allergies to vaccines or are travelling in a car or airplane, but there are other reasons why your cat may be recommended to take it.