Nonsteroidal Anti-inflammatory Drugs In Cats Research Articles

Métodos utilizados para avaliação da eficácia analgésica de opioides e anti-inflamatórios não-esteroidais em gatos

Ineffective pain treatment causes complicated situations, such as poor recovery and chronic pain in the patient. The recognition of feline pain is a great challenge, requiring training and scoring systems to assess pain in cats. Pain classification methods were created with the aim of helping professionals. The aim of this review was to verify which pain assessment and antinociception methods were used to assess the analgesic efficacy of opioids and non-steroidal anti-inflammatory drugs in cats with acute pain. The most used pain assessment method was thermal stimulation. Most studies found showed the analgesic efficacy of drugs.

Efectos adversos relacionados al uso de AINEs en el manejo de osteoartritis felina y canina

El mecanismo de acción de los antiinflamatorios no esteroideos (AINEs) consiste en reducir la producción de prostaglandinas (PG) a través de la inhibición de la enzima ciclooxigenasa (COX). Los pacientes más propensos a los efectos secundarios son aquellos de edad avanzada, debido a la reducción de su metabolismo y la excreción del fármaco. Se recomienda no administrar AINEs en pacientes hipovolémicos, deshidratados o hipotensos, y de especial cuidado en pacientes con disfunción cardíaca, renal, hepática, gastrointestinal y hemostática. Los AINEs han sido ampliamente utilizados en el tratamiento del dolor a largo plazo. La eficacia de carprofeno ha sido respaldada por la mayor cantidad de estudios, seguido por meloxicam y firocoxib. Sin embargo, estos pueden causar ulceraciones gástricas, perforaciones y hemorragias entre otros efectos adversos de tipo gastrointestinal, renal y hepático. Existe una marcada diferencia farmacocinética y farmacodinámica entre caninos y felinos que corresponden a diferencias en el metabolismo. La administración de ibuprofeno por lo general no se recomienda en perros, existe el riesgo de ocasionar efectos adversos como ulceraciones gástricas y perforaciones cuando se utiliza terapéuticamente, y posiblemente por muchos AINEs. El objetivo de esta revisión es describir los principales efectos adversos relacionados al uso de AINEs en felinos y caninos, lograr identificar y seleccionar los que aún hoy en día se pueda administrar como analgésico y antiinflamatorio no esteroideo con fines terapéuticos, en el manejo de inflamación, dolor y fiebre en el manejo de osteoartritis (OA) en estas especies en el control y cuidado en los intervalos de dosificación.

Long-term use of non-steroidal anti-inflammatory drugs in cats with chronic kidney disease: from controversy to optimism.

This is the first of a series of capsule reviews published by the World Small Animal Veterinary Association - Global Pain Council (WSAVA-GPC). Each of these short articles provides a brisk assessment of the scientific evidence in specific aspects of pain management, including analgesic techniques, recommendations and controversies surrounding their use. In this first capsule review, the scientific evidence available on the long-term use of non-steroidal anti-inflammatory drugs in cats with concomitant chronic pain and chronic kidney disease is discussed.

Perioperative use of non-steroidal anti-inflammatory drugs in cats and dogs

Non-steroidal anti-inflammatory drugs (NSAIDs) are efficacious analgesics that contribute to preventive and multimodal analgesic techniques. They are widely used for routine surgeries in cats and dogs and there is some...

Treatment of acute pain in cats

The cat's popularity as a pet continues to grow, with the most recent surveys showing approximately 17% of the population live with cats. This increased popularity of cats invariably means that more cats are presented to veterinary surgeons for surgery and treatment of painful conditions, but it seems that the treatment of pain in the cat has lagged behind that of other species. Lack of analgesic administration may well stem from the difficulties in assessing pain in the cat, but is probably compounded by the false perceptions of the likelihood of severe side effects occurring more frequently with the use of opioids and non-steroidal anti-inflammatory drugs in cats, thereby inadvertently denying them the analgesics they require. This article complements a previous article covering the assessment of acute pain in the cat ( White, 2016 ); the aim of this second article is to provide an evidence-based framework to follow for the treatment of acute pain in the cat.

ISFM and AAFP Consensus Guidelines: Long-Term use of NSAIDs in Cats

NSAIDS AND CATS: Non-steroidal anti-inflammatory drugs (NSAIDs) are an important class of drug in feline medicine, having analgesic, anti-inflammatory and antipyretic activity. While most published data on their use in this species relate to short-term (often perioperative) therapy, there is increasing evidence of the value of these drugs in treating chronic pain in cats (for example, that associated with degenerative joint disease), and some NSAIDs have now become licensed for long-term use in cats in some geographies. Most of our knowledge of therapeutic mechanisms or adverse drug reactions associated with NSAIDs is extrapolated from work in other species, and there is a paucity of published data relating to cats. These guidelines have been drawn together by an expert panel, which have reviewed the current literature on long-term NSAID use in cats and other species, and developed guidance on their use based on this information. The aim is to provide practical information for veterinarians to encourage appropriate NSAID therapy whenever cats will benefit from the use of these drugs.

Efficacy of tolfenamic acid and meloxicam in the control of postoperative pain following ovariohysterectomy in the cat

The hypothesis was that Visual Analog Scale (VAS) scores would be lower, and mechanical wound thresholds (MWT) higher, in cats receiving tolfenamic acid compared to those receiving placebo in the postoperative period following elective ovariohysterectomy. Sixty-nine client-owned cats. A prospective, randomized, blinded and placebo-controlled study was performed in cats which underwent ovariohysterectomy following preoperative tolfenamic acid, meloxicam, or placebo. A second dose of the same analgesic was administered 24 hours postoperatively. Assessments were made 1-hour before induction and 1, 2, 4, 6, 22, and 25 hours postoperatively. Pain was assessed by a blinded observer using Numerical Rating (NRS) and VAS scales. The MWT were measured using a force-measuring device. Group comparison was performed by using one-way ANOVA and chi-squared test for qualitative and quantitative data, respectively, and a mixed model for repeated measurements (p < 0.05). Sixty-five cats were included in the study. There were no differences between groups at baseline. There was a treatment effect on the NRS scores at 6, 22 and 25 hours. The meloxicam group was less painful than controls at 6 and 22 hours; both treatment groups were less painful than controls at 25 hours. There were no differences between groups in VAS for pain or sedation. The number of animals receiving rescue analgesia did not differ between groups. There was a treatment effect on MWT; thresholds in both treatment groups were significantly higher than that observed in controls at all time points. Preoperative tolfenamic acid or meloxicam reduced wound sensitivity following ovariohysterectomy in the cat. Tolfenamic acid and meloxicam administered preoperatively provided a similar analgesic effect in the postoperative period lasting 24 hours. Mechanical thresholds may be a better way of evaluating postoperative analgesia provided by nonsteroidal anti-inflammatory drugs in cats.

Development of in vitro assays for the evaluation of cyclooxygenase inhibitors and predicting selectivity of nonsteroidal anti-inflammatory drugs in cats

To develop and validate in cats suitable in vitro assays for screening and ranking nonsteroidal antiinflammatory drugs (NSAIDs) on the basis of their inhibitory potencies for cyclooxygenase (COX)-1 and COX-2. 10 cats. COX-1 and COX-2 activities in heparinized whole blood samples were induced with calcium ionophore and lipopolysaccharide, respectively. For the COX-2 assay, blood was pretreated with aspirin. The COX-1 and COX-2 assays were standardized, such that time courses of incubation with the test compounds and conditions of COX expression were as similar as possible in the 2 assays. Inhibition of thromboxane B2 production, measured by use of a radioimmunoassay, was taken as a marker of COX-1 and COX-2 activities. These assays were used to test 10 to 12 concentrations of a COX-1 selective drug (SC-560) and of 2 NSAIDs currently used in feline practice, meloxicam and carprofen. Selectivities of these drugs were compared by use of classic 50% and 80% inhibitory concentration (ie, IC50 and IC80) ratios but also with alternative indices that are more clinically relevant. These assay conditions provide a convenient and robust method for the determination of NSAID selectivity. The S(+) enantiomeric form of carprofen was found to be COX-2 selective in cats, but meloxicam was only slightly preferential for this isoenzyme. In vitro pharmacodynamic and in vivo pharmacokinetic data predict that the COX-2 selectivity of both drugs for cats will be limited when used at the recommended doses. This study provides new approaches to the selection of COX inhibitors for subsequent clinical testing.

Adaptation of thermal threshold analgesiometry for NSAIDs in cats: effects of ketoprofen

Nonsteroidal anti-inflammatory drugs (NSAIDs) are widely used to provide analgesia in clinical veterinary medicine, but there are few objective data evaluating this effect under controlled conditions in cats. Analgesia is more difficult to detect with acute analgesiometry after NSAIDs than after opioids. This investigation aimed to adapt the feline thermal analgesiometry method previously employed with opioids (Dixon et al. 2002) for use with NSAIDs. Ketoprofen, a COX1 inhibitor licensed for cats was chosen. Six cats (2 neutered, four entire females, weighing 2.2–5.4 kg) were studied in two blinded randomized crossover trials each at least 2 weeks apart. Thermal thresholds (TT) were measured using the thermal threshold-testing device previously developed for cats. A heater element and temperature sensor in a small probe were held at constant pressure against the cats' shaved thorax with an elasticized band. Skin temperature was recorded before each test, then the heater activated. When the cat responded by flinching, turning or jumping the heater was turned off and the temperature recorded. In the first study TT were measured following subcutaneous (SC) injection of ketoprofen (2 mg kg−1) or a similar volume of saline. In the second study, prior to TT, and under isoflurane restraint, a mild inflammatory focus was produced at the probe site by five SC injections of 5 mg kaolin in 0.1 mL saline at each corner and in the center of a 1.5-cm square. Saline or ketoprofen as in the first study were injected at the same time. Three baseline temperatures were recorded before any injections were given. Thermal thresholds were measured at 1 and 2 hours and then two-hourly for 24 hours. Data were analysed using anova. Baseline skin temperature increased (37.3 ± 0.5–38.1 ± 0.8 °C) 24 hours after saline injection in study 2 (p < 0.05) but did not change after any other treatment. Thermal thresholds decreased (40.0 ± 1.3 to 39.1 ± 0.4 °C) 16 hours after ketoprofen in study 1 (p < 0.05) and increased (41.6 ± 1.5–44.8 ± 6.1 °C) 16–24 hours after ketoprofen in study 2 (p < 0.05), with no significant changes after saline. No obvious increase in sensitivity to thermal stimulation after kaolin injection was detected although obvious inflammation was present for up to 36 hours and the cats responded to digital pressure at the treated site. The method detected some effects of a COX1 selective NSAID and may be suitable for future NSAID studies in cats. However, a pressure stimulus (Dixon et al. 2000) may prove better than thermal, and it requires investigation.