Understanding the Adverse Effects of Polypharmacy
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Polypharmacy is an umbrella term that describes the use of multiple medications by a patient at the same time. Commonly, it refers to the regular use of five or more medicines, especially among older adults who often manage several health conditions simultaneously.
While taking multiple medications can sometimes be necessary to treat complex or multiple chronic illnesses effectively, polypharmacy also carries risks if not managed properly.
The Adverse Effects of Polypharmacy
Polypharmacy occurs frequently in older adults due to the presence of multiple health issues like diabetes, hypertension, or arthritis, which require different treatments.
However, when patients take more medications than are clinically appropriate, or when drugs are prescribed without careful consideration of interactions and side effects, it is called inappropriate polypharmacy.
This can result in harmful effects such as:
Adverse Drug Reactions (ADRs)
Each additional medication increases the risk of side effects and drug interactions, which can compound to cause serious health problems such as dizziness, sedation, confusion, and gastrointestinal issues. ADRs are responsible for about 10% of emergency visits among older adults, impairing daily functioning and causing hospitalisations.
Cognitive Impairment
Another potential adverse effect of polypharmacy is cognitive impairment. Some medications affect brain chemistry, leading to memory loss, confusion, reduced attention, or even increasing the risk of dementia. Drugs with anticholinergic effects or sedatives are common culprits. Cognitive declines caused by medication often go unrecognised as reversible causes compared to diseases like Alzheimer’s.
Medication Non-Adherence
The complexity of managing multiple drugs—different doses, schedules, and side effects—often leads to missed or incorrect dosages, reducing treatment effectiveness and increasing health risks.
Increased Healthcare Costs
More medications mean higher expenses for patients and healthcare systems, including costs for managing side effects, hospitalisations, and additional treatments due to drug complications.
Organ damage
Certain drugs can cause harm to organs like kidneys and liver, especially when combined. Polypharmacy increases the risk of drug-induced organ injury due to altered drug metabolism in older adults.
Knowing What to Do
Safely managing polypharmacy involves regular check-ups with healthcare providers to review each medicine, looking for any harmful drug interactions or side effects, and deciding if some medicines can be stopped or doses adjusted.
Proper management also includes having the right information about your treatments and practising clear communication among doctors, pharmacists, and caregivers to keep track of medications and improve overall care.
