The analgesic effects of magnesium in veterinary patients: a qualitative evidence synthesis.

This research aims to evaluate the pain-relieving properties of magnesium in domestic animals, with particular focus on whether it can enhance anaesthetic effects. The research, which encompassed a range of animals, including dogs, cats, horses, cows, sheep, and goats, found mixed results and calls for further studies to conclusively establish the effectiveness and applicability of magnesium in animal pain management.

Research Methodology

• The researchers conducted a comprehensive review of studies using online databases like PubMed and Google Scholar. Only those studies published after 1990 were considered.
• The studies were selected based on their pertinence to the use of magnesium in domestic animals and whether or not they involved pain relief.
• A detailed cross-check of references in the selected publications was undertaken to ensure no relevant paper was overlooked.
• Quality and reliability of the evidence gathered were assessed using the CERQual (Confidence in Evidence from Reviews of Qualitative Research) method.

Results and Findings

• A total of 20 studies were found that dealt with magnesium’s analgesic effects in pets, as well as two review articles. All these were published post 2006.
• Out of the 20 studies, five offered information on pain relief in dogs after surgery, but the results varied widely.
• The use of magnesium in epidural form was found to increase sensory block duration in multiple species. It was also seen to cause a motor block when added to spinal analgesia.
• The research found conflicting data on whether magnesium had any effect in reducing the requirement for volatile agents.
• Occasionally, moderate side effects were observed in dogs, such as nausea, vomiting, and hypotension, particularly when given as a concentrated dose to conscious animals or via the abdominal cavity. Horses were reported to have collapsed post epidural administration.

Conclusions

• The authors concluded that the evidence of magnesium’s analgesic properties in veterinary patients is limited due to the lack of high-quality data.
• The study establishes the need for additional research to determine the effectiveness and appropriate usage of magnesium in multimodal animal pain management.