Temaril-P is a prescription medication for dogs that treats itching and coughing. It combines two active ingredients, an antihistamine and a low-dose steroid, into a single tablet. Veterinarians commonly prescribe it for skin allergies, chronic bronchitis, and persistent non-productive coughs.
How the Two Ingredients Work Together
Each Temaril-P tablet contains trimeprazine, an antihistamine, paired with prednisolone, a corticosteroid. The logic behind the combination is that the antihistamine boosts the effectiveness of a lower steroid dose than would normally be needed on its own. This means your dog gets meaningful itch and cough relief while being exposed to less steroid overall.
For itching, the antihistamine blocks part of the allergic response while the steroid reduces the underlying inflammation driving the itch cycle. For coughing, both ingredients help dry out respiratory secretions, which is why the medication works well for dogs with chronic bronchitis or lingering kennel cough that has turned into an irritating, non-productive hack. The same dosage schedule is used whether the goal is controlling itching or suppressing coughs.
Conditions It Treats
The most common reason a vet prescribes Temaril-P is allergic skin disease. Dogs that scratch, lick, or chew at themselves due to environmental allergies, contact allergies, or other inflammatory skin conditions are typical candidates. It’s particularly useful when a dog’s itching is severe enough to cause hair loss or skin damage but the vet wants to keep steroid exposure modest.
The second major use is respiratory. Dogs with chronic coughing, especially dry coughs tied to bronchitis or post-infectious irritation, often respond well to the combination. Because trimeprazine has mild sedating properties (it belongs to the same drug class as some tranquilizers), it can also help calm an anxious dog whose coughing worsens with excitement or stress.
Dosage and How It’s Given
Temaril-P is dosed by your dog’s weight and given by mouth, typically twice daily for the first four days. The standard starting schedule looks like this:
- Up to 10 lbs: half a tablet, twice daily
- 11 to 20 lbs: one tablet, twice daily
- 21 to 40 lbs: two tablets, twice daily
- Over 40 lbs: three tablets, twice daily
After those first four days, the dose is cut in half, or reduced to the smallest amount that keeps symptoms under control. This step-down approach is intentional. Because the medication contains a steroid, the goal is always to find the lowest effective dose for your individual dog. Some dogs can eventually move to every-other-day dosing, while others need a consistent daily amount to stay comfortable.
Side Effects to Watch For
The most noticeable side effects come from the steroid component. You may see your dog drinking more water than usual and needing to urinate more frequently. Increased appetite is also common with steroid-containing medications. These effects are generally mild at the low doses used in Temaril-P and tend to decrease when the dose is reduced after the initial four-day period.
The antihistamine side can cause drowsiness, especially in the first few days. Most dogs adjust to this quickly. Less commonly, the product label notes that blood cell abnormalities can occur, which is why veterinarians may recommend periodic blood work for dogs on longer courses of the medication.
Risks of Long-Term Use
The steroid in Temaril-P is the component that raises the most concern with extended use. Prolonged or repeated steroid therapy in dogs has been associated with Cushing’s syndrome, a condition where the body is exposed to too much cortisol. Signs include a pot-bellied appearance, thinning skin, excessive thirst, and muscle weakness.
Long-term steroid use can also suppress your dog’s immune system, making them more vulnerable to bacterial infections or worsening infections that are already present. Additionally, when a dog has been on steroids for a prolonged period, the body’s own ability to produce natural stress hormones can shut down. This means the medication should never be stopped abruptly. A gradual taper gives the adrenal glands time to resume normal function.
For dogs that need ongoing itch control, vets sometimes use Temaril-P as a short-term bridge while establishing longer-term allergy management strategies, such as identifying and avoiding triggers or transitioning to non-steroidal itch medications. The combination works well for flare-ups and acute episodes, but the steroid component makes indefinite daily use something most veterinarians try to avoid when alternatives exist.
Dogs That Should Not Take It
Because of the steroid ingredient, Temaril-P is not appropriate for dogs with active fungal infections, as steroids can worsen them significantly. Dogs with diabetes or existing Cushing’s syndrome are also poor candidates, since even low-dose steroids can destabilize blood sugar or compound hormone imbalances. Pregnant dogs should not take the medication either, as corticosteroids can affect fetal development. If your dog is already on other steroid medications or immune-suppressing drugs, the vet will need to weigh whether combining them is safe.