Abstract
Pain is common in older adults and managing pain in this population can be challenging owing to altered pharmacokinetics, multimorbidity, polypharmacy, cognitive impairment, and physical frailty. A fixed-dose combination (FDC) analgesic contains two or more pharmaceutical ingredients in a single pill and may offer more benefits when compared with loose-dose formulations. The benefits include reduced pill burden and better adherence, a broader analgesic spectrum well-suited to multimechanistic pain conditions and more predictable pharmacokinetic and pharmacodynamic properties. These advantages may outweigh disadvantages such as reduced flexibility in dose adjustment. Most of the commonly used FDC analgesics are made up of a combination of paracetamol, muscle relaxant, nonsteroidal anti-inflammatory drug or opioid. They have been shown to have better efficacy and similar safety profiles compared with individual drugs. Adverse effects from the use of FDC analgesics in older patients were comparable with that observed in younger populations. With proper patient selection and continuous surveillance, FDC analgesics will likely benefit older adults by simplifying dosing regimen and improving compliance.
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