A Dive Into Oliceridine and Its Novel Mechanism of Action

The current state of the opioid epidemic has revealed the need of utilizing proper pain management, especially in the postoperative setting where there is overuse of potent analgesics. However, the adequate treatment of pain is necessary to reduce mortality and cost of burden while increasing recovery and improving quality of life. Treatment of pain can be difficult to standardize as the guidelines from the American Pain Society discuss the importance of tailoring treatment options based on a patient’s sensitivities and risk factors. An effective fast-acting analgesic with adequate potency and few adverse events is the key to alleviating acute pain. Oliceridine (Olinvyk^®, Trevena Inc., Chesterbrook, USA) is a novel G protein-biased μ-opioid receptor agonist designed to decrease opioid-related adverse events (ORAEs) compared to conventional opioids. This article discusses oliceridine’s novel mechanism of action and current place in therapy. After a literature search on clinicaltrials.gov, three clinical trials were analyzed to understand the safety and efficacy of oliceridine. These trials demonstrated a comparable efficacy to morphine with a decreased risk for serious adverse events. However, further studies need to be conducted to evaluate the true safety impact of oliceridine compared to conventional opioids. 

Combination of paracetamol or ketamine with meperidine enhances antinociception

OBJECTIVES

Dealing with pain is one of the most important issues of medicine. All of the studies aim to find a drug or combination of drugs in order to have more effective analgesia and less side effects. In this study, we aimed to investigate the antinociceptive effects of combination of paracetamol or ketamine with meperidine.

METHODS

In this study, we evaluated the systemic antinociceptive effects of meperidine, paracetamol, and ketamine one by one with their combinations. We used 50 mice (weighing 25-30 g), which were divided into 5 groups with each group consisting of 10 mice. Meperidine was applied to animals with increasing doses and their tail flick latencies (TFL) were noted at 20, 40, 60, 90, 120, 180, and 240 min. The same protocol was repeated after the combination of meperidine with paracetamol or ketamine.

RESULTS

There was no analgesic effect on low doses of ketamine and paracetamol at TFL measurements. But the combination of low doses of these drugs with meperidine significantly increased TFL (p < 0.05).

CONCLUSION

It was observed that meperidine + ketamine and meperidine + paracetamol combinations have potent analgesic effect.