Temaril P

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Temaril P

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Temaril P

Temaril P is a prescription-only veterinary medicine formulated as an oral tablet for systemic application in dogs. This drug is defined by its dual-action fixed-dose combination of two synthetically derived, pharmacologically distinct compounds, designed to address symptoms simultaneously. The medicine is clinically recognized for its specific application in veterinary practice where both inflammation and itching are primary concerns.

Quick Facts
Active Ingredients Trimeprazine, Prednisolone
Form Oral Tablet
Pharmacological Class Antihistamine and Corticosteroid
Origin Synthetic
Route of Administration Oral

Composition: Antihistamine and Corticosteroid Dual Action

Temaril P contains the active ingredients Trimeprazine (an H1 receptor antagonist) and Prednisolone (a synthetic glucocorticoid). This combination is classified as an antipruritic and anti-inflammatory agent. The inclusion of Trimeprazine provides the primary antipruritic effect, specifically addressing the neural pathways responsible for the sensation of itching. Prednisolone, the corticosteroid, functions as a potent anti-inflammatory agent and immunosuppressant, offering systemic control over the underlying inflammatory process. This fixed-dose approach is effective in veterinary dermatology, streamlining the administration of two concurrent therapies.


General Purpose: Addressing Itching and Inflammation Simultaneously

The general purpose of the Temaril P formulation is to provide a systemic approach designed to break the itch-scratch cycle and to deliver effective relief from associated inflammation. The medicine is used for the relief of itching and the reduction of inflammation commonly associated with most skin disorders in dogs. This dual-action strategy is employed when the severity of symptoms necessitates the simultaneous action of both an anti-itch agent and a potent anti-inflammatory agent integrated into a single oral dosage form.

Regulatory References

  1. DailyMed Temaril-P Monograph
  2. FDA FOI Summary for Trimeprazine/Prednisolone

What side effects are possible with Temaril P?

Possible Side Effects and Safety Information

The official safety profile of Temaril P is defined by the combined action of its two active components, the corticosteroid Prednisolone and the antihistamine Trimeprazine, as outlined in regulatory documents.


Common Adverse Reactions and Systemic Effects

Side effects categorized as common or frequently observed are typically related to the corticosteroid component, involving metabolic and endocrine changes. These include increased thirst (polydipsia), increased appetite (polyphagia), and increased urination (polyuria). Due to the antihistamine component, drowsiness and lethargy are also commonly documented reactions. These effects are often observed during the initial phase of treatment.

System-Organ Class Examples of Documented Reactions
Metabolism / Nutrition Increased thirst, Increased appetite, Weight gain
Nervous System Drowsiness, Lethargy
Endocrine System Adrenal cortical suppression, Cushing's syndrome
Gastrointestinal Vomiting, Diarrhea, Gastrointestinal ulceration

Serious and Exposure-Related Safety Concerns

The regulatory profile explicitly identifies serious adverse reactions, particularly those associated with the prolonged administration of the corticosteroid. Adrenal cortical suppression, the potential for inducing Diabetes Mellitus, and the development of Cushing's Syndrome are documented as risks associated with chronic or extended use. Gastrointestinal ulceration is also listed as a serious potential risk.


Safety Restrictions and Special Populations

Safety statements advise caution or restrict use in specific scenarios. Use is contraindicated in cases of known hypersensitivity to the drug's components or in patients with certain active infections, such as viral or fungal conditions, due to the immunosuppressive effect of Prednisolone. Safety has not been established for use in breeding animals, and corticosteroids may carry risks for the fetus, such as causing cleft palate, if used during pregnancy, according to official labeling.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdosage with this combination medication primarily affects the Central Nervous System (CNS) and Cardiovascular System, leading to potentially severe outcomes related to the phenothiazine derivative and corticosteroid components.

Overdose Risk Entity Official Regulatory Documentation
Manifestations Documented signs include excessive drowsiness, loss of balance, muscle tremors or rigidity, and seizures. Physiological effects may involve dangerously low blood pressure (hypotension), cardiac instability, polydipsia, and polyuria.
Severe Outcomes Life-threatening risks include sustained hypotension and suppressed adrenal cortical function (adrenal suppression). Long-term overexposure is associated with the development of Cushing's syndrome.
Special Note Classic cortisone overdosage signs like sodium retention may not occur with prednisolone, requiring alertness for less obvious effects such as blood dyscrasias.

The official regulatory documents classify overdosage as an event capable of causing severe systemic and neurological distress. Management for this severe exposure is defined as symptomatic and supportive treatment. No specific antidote is formally documented in the official prescribing information.

Emergency Action Requirement

Immediate medical attention is officially required for any suspected overdosage. Regulators mandate that professional assistance, such as an animal poison control center or emergency veterinary care, must be sought immediately. Management protocols require continuous monitoring of respiratory, cardiac, and central nervous system function to stabilize the patient.

Therapeutic Uses of Temaril P

What Temaril P Treats: Main Uses and Benefits


The medication is commonly used across two primary therapeutic domains—dermatology and respiratory support—for dogs.

Targeted Symptom Support and Relief

This medication helps address symptoms related to pruritus (itching) and associated inflammation, which characterizes various allergic and atopic dermatological conditions, including eczema, otitis, and non-specific dermatitis. It is also applied across domains where additional symptomatic support is needed for the persistent, non-productive coughing seen with conditions like tracheobronchitis and various types of bronchitis.

“It is commonly used across conditions presenting with acute episodes where short-term symptomatic assistance is needed.”

The medication is commonly used to help with symptom clusters that may create noticeable interference with daily stability. It supports patients during difficult episodes, helping to ease noticeable physiological strain and contributing to improved comfort during periods of heightened symptoms.

Quick Fact: Support for Primary Symptom Domains
Primary Symptom Domains Pruritus, Inflammation, Persistent Cough
Typical Conditions Allergic Dermatitis, Eczema, Bronchitis
Key Patient Benefit Supports easing the overall symptom burden

Regulatory References

  1. according to authoritative prescribing information

Eligibility and Restrictions for Use

The official regulatory documentation for Temaril P (trimeprazine with prednisolone) strictly defines the eligible population and conditions for use, establishing that the medicine is For use in dogs only, excluding all other species.

Classification Population or Condition
Absolute Contraindication Animals with Tuberculosis, Peptic Ulcer, or Cushing’s Syndrome (untreated hyperadrenocorticism)
Use With Extreme Caution Pregnant animals, especially during the last trimester, due to the documented risk of inducing premature delivery and congenital anomalies

Eligibility-Related Restrictions

Certain physiological states and co-existing conditions require specific attention or conditional use, as mandated by the product labeling. Use in young, growing animals must be with caution, as the corticosteroid component has the potential to stunt growth. For dogs with an acute or chronic bacterial infection, the medicine may only be administered provided the infection is concurrently controlled by appropriate antibiotic or chemotherapeutic agents. Animals presently or recently withdrawn from systemic steroid treatments may require additional, rapid-acting corticosteroids in unusually stressful situations.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents define the interaction profile of Temaril P based on its dual active ingredients, Trimeprazine (a phenothiazine derivative) and Prednisolone (a corticosteroid).

Documented Pharmacodynamic Interactions

Co-administration with medicines that cause Central Nervous System (CNS) depression may result in the intensification and prolongation of their effects. These include analgesics, sedatives, and general anesthetics. The phenothiazine component can also potentiate the activity of Procaine Hydrochloride and intensify organophosphate toxicity. Concurrent use with Potassium-Depleting Diuretics increases the regulatory-documented risk of hypokalemia due to additive potassium loss.

Contraindicated Combinations and Restrictions

Regulatory agencies strongly caution against the co-administration of the corticosteroid component with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), as this combination significantly increases the risk of severe gastrointestinal complications. When a pressor agent is required, Epinephrine must be avoided, as phenothiazines can reverse its pressor effect, potentially leading to further hypotension.

Metabolic Clearance Alterations

Interaction patterns involving the Prednisolone component include changes in metabolic clearance. Enzyme inducers such as Phenobarbital and Rifampin may decrease the systemic exposure of Prednisolone. Conversely, Enzyme inhibitors such as Ketoconazole may increase Prednisolone exposure. No mandatory timing-based co-administration rules are explicitly documented in the official prescribing information.

Mechanism of Action

The action of Temaril P is defined by two complementary, distinct pharmacological mechanisms: the rapid antagonism of histamine signaling and the delayed, systemic genomic regulation of inflammation.

Modulating Histamine Signaling: Mechanisms of Neural Dampening

The active ingredient Trimeprazine acts as an H1 receptor antagonist, physically blocking histamine from binding to receptors on nerve endings and in the central nervous system . This mechanism quickly suppresses the neural conduction responsible for the sensation of pruritus.

Genomic Regulation of Inflammatory Cascades

Prednisolone works by targeting the cytosolic Glucocorticoid Receptor, initiating a complex genomic cascade. This involves translocating to the cell nucleus to influence gene transcription, resulting in the suppression of genes that produce pro-inflammatory mediators (like prostaglandins and leukotrienes). This systemic mechanism supports a regulated state within the key inflammatory pathways.

Temporal Synergy of Dual-Action Mechanism

The drug's overall physiological profile benefits from the temporal synergy of its components. The fast-acting H1 antagonism provides immediate neural signaling modulation, while the slower-onset, long-lasting genomic action affects the underlying biochemical dysregulation, and contributes to a coordinated, multi-level modulation of the affected physiological systems.

Dosage and Administration Information

Administration Scope

The administration of Temaril P is strictly governed by a phased, weight-based schedule, delivered in the form of an oral tablet. The dosage schedule is identical for both its use in anti-itch and antitussive management.

Feature Detail
Route of administration Oral administration.
Dosing schedule (Initial) Determined by the dog’s weight, administered twice daily (BID).
Timing in relation to meals May be administered with or without food.
Age-group administration rules Dosing is applied based on the weight of the dog, not age.
Special procedural conditions May be used during bacterial infections provided the infection is controlled by appropriate therapeutic agents.

Labeled Dosing Regimens

The initial dosage is calculated based on the weight of the dog and is administered twice daily for the initial four-day treatment period.

Weight of Dog Initial Dosage (Twice Daily)
Up to 10 lb 1/2 tablet
11–20 lb 1 tablet
21–40 lb 2 tablets
Over 40 lb 3 tablets

Resulting Procedural Structure

Official step sequence:

  • The initial dose, determined by weight, is given twice daily for the first four days.
  • Following this, the dosage must be reduced to half the initial amount or adjusted to the minimum amount necessary to maintain symptom control.
  • After prolonged administration, the medicine must be withdrawn gradually as directed by a licensed veterinarian.

Connection to the overall use protocol (2–4 sentences):

The official use protocol is structured as a phased, weight-dependent regimen that starts with a twice-daily dose over a specific duration. This initial phase is systematically followed by a required tapering protocol to establish a lower maintenance dose. The process culminates in a gradual withdrawal after extended use.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Temaril P

Evidence for Use in Pruritus and Associated Skin Disorders

The clinical evaluation for this medicine was studied for use in research contexts involving fluctuating or unstable symptoms, such as allergic dermatitis, eczema, and various nonspecific skin disorders. Initial regulatory documentation included core studies and supporting research that researched exploring short-term symptom changes. The study populations were observed in research contexts where outcomes related to physical discomfort and outcomes linked to inflammatory or irritative states were examined.

Research examined outcomes related to patient-reported outcomes describing perceived discomfort from itching, typically using standardized scales where owners or veterinarians reported how symptoms evolved during the study period. Data show patterns related to how symptoms evolved in the observed populations during the short-term study periods. Studies also explored outcomes capturing phases of heightened symptom activity and whether findings describe patterns observed in these phases.

Evidence for Use in Cough and Bronchitis Conditions

The medicine was studied for its application as a therapy or adjunctive therapy for respiratory issues, specifically conditions involving periods of heightened symptoms like tracheobronchitis ("kennel cough") and various bronchitis types. Regulatory documentation included core studies that focused on outcomes related to systemic or functional imbalance caused by persistent coughing. The study populations were observed in dogs with these specific respiratory conditions, while excluding those where the cough was associated with primary heart problems.

Studies monitored outcomes reflecting outcomes describing episodic or acute changes in respiratory function, primarily through measurements of monitoring physiological strain or stress and outcomes describing episodic or acute changes in cough frequency and severity. Findings describe patterns observed in the research examining temporary physiological imbalance. Research reports how symptoms evolved in the observed populations during the defined time intervals of the trial, mainly focusing on short-term changes where symptoms may vary in intensity.

What Remains Uncertain in the Research Record

The evidence highlights what is known — and what is still uncertain about the medicine's research profile. Long-term effects are not fully established, meaning there is limited information for long-term outcomes related to patterns related to symptom changes or extended use. Additionally, comparative evidence is lacking against the full range of modern alternatives in both dermatology and respiratory support. Data for certain groups remain insufficient, particularly concerning large, recent, and long-term observational settings evaluating daily-life functioning.

Key Studies & References

  1. Temaril-P® (trimeprazine with prednisolone) Tablets Prescribing Information
  2. Temaril-P® - DailyMed (Trimeprazine Tartrate and Prednisolone Tablet)
  3. Freedom of Information Summary for the Original Approval of ANADA 200-784 (Trimeprazine with Prednisolone Tablets) - Animal Drugs @ FDA

Frequently Asked Questions (FAQ)

Common questions about Temaril P (FAQ)

Q: How quickly does Temaril P usually start working?

Official product information indicates that the drug typically begins to have an effect within approximately one to two hours after it is administered. This initial action is primarily attributed to the antihistamine component. However, the complete range of symptom improvement may take more time as the corticosteroid component has a slower onset.


Q: What is the intended purpose of Temaril P treatment?

Temaril P is described in official documents as a combination treatment intended to address multiple symptoms simultaneously. Its two components work together to provide relief from itching (antipruritic effect) and to help manage various cough conditions (antitussive effect) by reducing inflammation.


Q: Can Temaril P be used long-term?

Official recommendations emphasize use for the shortest duration necessary to control symptoms. After the initial period, the administration protocol involves gradually reducing the dose to the lowest effective level, as chronic or extended use is associated with documented serious risks related to the corticosteroid component.


Q: Can Temaril P interact with common over-the-counter pain relievers?

Yes, official product warnings state that caution is necessary when using Temaril P concurrently with certain types of pain relievers. Combining it with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) carries a significant risk of severe gastrointestinal complications. Furthermore, the combination with certain other analgesics (pain relievers) may lead to intensified or prolonged effects.


Q: Is it important to avoid certain foods or drinks while taking Temaril P?

The official administration instructions state the tablet can be given with or without food, though giving it with food is often suggested to help lessen potential digestive upset. No specific foods or drinks are strictly forbidden in the regulatory documents, but it is notable that patients commonly experience increased thirst due to a common side effect.


Q: Have there been clinical studies that look at the duration of effect for Temaril P?

Studies indicate that the effects of the medication are generally considered short-acting, with the effects of a single dose typically subsiding within 24 hours. It is noted in official information that the duration of effect may be prolonged in patients with underlying liver or kidney conditions.


Q: Can Temaril P affect sleep patterns?

Official documents indicate that the drug can affect the regular sleep/wake state, as drowsiness and restlessness are among the commonly documented side effects. This is often linked to the component that works to suppress histamine signaling.


Q: Is Temaril P available in different strengths or forms?

According to official product labeling, the medication is supplied as a single, scored oral tablet formulation. Each tablet contains a fixed combination of the two active ingredients: 5 mg of trimeprazine (equivalent) and 2 mg of prednisolone.


Q: Can Temaril P affect mood or mental state?

Yes, official safety documents indicate that the corticosteroid component may lead to changes in mood or behavior. Documented effects include the potential for mild behavioral changes, such as restlessness, and in some cases, aggression.


Q: Is there a maximum time frame for using Temaril P according to research?

Official guidelines emphasize using the product for the shortest duration necessary to control the condition. While there is no specific stated maximum duration in the labeling, the approved protocol specifies reducing the dose after a 4-day initial period and then tapering it off completely when appropriate, consistent with the guidance for limiting corticosteroid exposure.


Q: What does 'contraindications' mean in relation to Temaril P?

In regulatory terms, a 'contraindication' refers to a specific condition or factor where the use of a drug is improper or potentially harmful to the patient. For Temaril P, contraindications include conditions like known hypersensitivity to the drug's components, as well as certain active infections such as viral or fungal conditions.


Q: What happens if I forget to take a dose of Temaril P?

The official guidance documented for a missed dose indicates that the drug is typically administered at the next regularly scheduled time. The guidance also specifically states that administering two doses at once to compensate is not recommended.


Q: Can individuals with existing liver conditions use Temaril P?

Official product warnings state that Temaril P requires caution in patients with underlying liver disease. Since the drug is metabolized in the liver, impaired function may result in prolonged effects from the medication.


Q: What is known about using Temaril P in older adult populations?

There is no specific set of guidelines tailored just for older adult patients in the official labeling. However, official warnings reference the need for caution in patients with conditions like underlying organic brain disease, which may be more prevalent in older patients, due to the potential for compounded central nervous system effects.


Q: What happens to the drug in the body after it is taken?

Official regulatory research indicates that the components of Temaril P undergo metabolism (chemical change) primarily in the liver. Studies track how quickly the active ingredients reach their highest concentration in the body (T MAX) and the speed at which they are eliminated (half-life).


Q: What should be done if an adverse reaction is suspected?

Regulatory guidance describes a procedure wherein, if a potential adverse reaction or overdose is suspected, the prescribing veterinary office or emergency facility should be contacted immediately. Patients are typically advised to follow the specific emergency instructions provided by their healthcare provider.


Q: Are there any special considerations for people with kidney issues using Temaril P?

Official product warnings state that Temaril P requires caution in patients with underlying kidney disease. Since the kidneys help eliminate drugs from the body, impaired function may result in prolonged effects from the medication.


Q: What are the official warnings about potential vision changes with Temaril P?

The side effect profile includes specific warnings related to potential changes in the eye region. The documented effects include the occurrence of exposure of the third eyelid (a membrane that protects the eye) as a possible adverse reaction.


Q: Does regulatory information discuss taking Temaril P with other steroid medicines?

While not explicitly listing other corticosteroids as a direct interaction, the combination product is designed to potentially reduce the amount of steroid needed. This regulatory context suggests caution regarding the potential for additive effects if the product is combined with other steroid-containing medications.


Q: Can Temaril P cause skin changes or thinning?

Official safety documents confirm that long-term use of the corticosteroid component may be associated with dermatological changes. These documented effects include the potential for skin thinning, hair loss, and other hair coat problems.


Q: Can Temaril P be taken at the same time as cold and flu remedies?

The interaction profile indicates that caution is necessary regarding many common ingredients found in cold and flu remedies. Warnings are in place for sedating medications and other Central Nervous System depressants due to potential additive effects, as well as NSAIDs which are common in pain and fever remedies.


Q: What patient monitoring is suggested by official documents while using Temaril P?

Official regulatory guidelines specify that regular monitoring, such as blood work and urinalysis, is typically performed for patients on long-term treatment. The patient's level of sedation and other potential side effects are also key observations to be documented.


Q: Is Temaril P known to interact with herbal supplements?

Official regulatory warnings specify that any supplements or herbal therapies being used should be communicated to the prescribing veterinarian. This is due to the potential for interactions with the active components of the medication.


Q: How is Temaril P classified regarding its use in children?

The official labeling for Temaril P explicitly states the product is 'For use in dogs' and is restricted to use by or on the order of a licensed veterinarian. Therefore, its safety and classification for use in human children have not been established in the official documents.

How should Temaril P be stored and disposed of?

Storage and Disposal: Official Regulatory Information

The official labeling for Temaril P (trimeprazine tartrate and prednisolone tablets) strictly defines the conditions necessary to maintain product integrity and safety.

Labeled Storage Temperature: Controlled room temperature, not above 25 C (77 F).
Protection Requirements: Must be stored in a dry, cool place away from heat, direct sunlight, and excessive moisture.
Child Safety Requirements: The medicine must be kept out of reach of children and pets and stored in a childproof container.
Disposal Instructions: Dispose of the product and its containers in accordance with local, regional, and national regulations. Environmental release, including disposal into wastewater, must be avoided.

These storage and disposal statements require continuous temperature and environmental control, specifically protecting the tablets from degradation due to heat or moisture. The mandatory safety instructions also require that the product be securely stored away from children and pets, and disposal must follow established pharmaceutical waste protocols.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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