Polypharmacy: when five or more medicines deserve a second look
Taking several medicines at once for different, genuine health conditions is common, and very often entirely appropriate. But the more medicines someone takes together, the more the chances of an interaction, a duplication or a side effect being mistaken for something else quietly grow — and that pattern has a name: polypharmacy.
If your family member sees more than one doctor, it’s easy for their medicine list to grow one prescription at a time, each one reasonable on its own, without anyone ever standing back to look at the whole list together. That’s an ordinary way for a list to get long. It’s also exactly the situation where it’s worth a second look, not because anything has necessarily gone wrong, but because nobody may have checked yet.
It often builds up in small, sensible steps. A blood pressure tablet a decade ago. Something for cholesterol a few years later. A medicine to manage a side effect of one of the others. Something for sleep after a stressful period that never quite got reviewed once things settled down. Looked at one prescription at a time, every addition made sense in the moment — it’s only when you lay the whole list out together that a pattern worth checking becomes visible.
So what is polypharmacy, exactly?
Polypharmacy is the term doctors and pharmacists use for taking multiple medicines at the same time. In Australia, it’s commonly defined as taking five or more medicines regularly, counting prescription medicines, over-the-counter products and complementary or herbal medicines together.1,2 It sounds clinical, but the situation it describes is ordinary: a person managing a few chronic conditions, on medicines from a GP and one or two specialists, plus something for sleep or pain picked up along the way.
Polypharmacy on its own isn’t a diagnosis and isn’t automatically a problem. Many people take five, eight or more medicines appropriately, and each one is doing a genuine job.1 What matters is whether the whole combination has actually been checked together, and how recently.
Why does the number of medicines matter?
The RACGP’s clinical guidance for GPs notes that the risk of an adverse reaction increases with the number of medicines a person takes, and that polypharmacy is associated with suboptimal prescribing, hospitalisation, and geriatric issues such as confusion, falls and frailty.2 Part of the risk is a pattern called a prescribing cascade, where a side effect from one medicine is mistaken for a new health problem, and a second medicine is started to treat it, when reducing or reviewing the first medicine may have been the better answer.2
None of this means five medicines is automatically five too many. A pharmacist fact sheet used by GPs and specialists is explicit that the number of medicines alone, “5 or more medicines”, is not on its own a valid indicator of harm — it is a useful prompt to look closer, not a verdict.3 What actually matters is whether each medicine is still needed, still working, and still safe alongside everything else on the list.
Polypharmacy isn’t a problem to panic about. It’s a description of a common situation that’s worth checking properly, in the same way a longer trip is worth a proper service, not because the car is broken, but because nobody’s looked under the bonnet in a while.
What actually reduces the risk?
A structured, whole-list review, rather than a quick glance at one repeat script at a time. In Australia, the funded, structured response to exactly this situation is a Home Medicines Review: a pharmacist sits down with your family member, goes through every medicine they actually take, checks for duplication, interactions and doses that may need adjusting, and reports back to their GP.4 The RACGP’s own guidance specifically recommends considering a Home Medicines Review as part of managing polypharmacy in the community.2
The review doesn’t remove or change anything itself. It gives your family member’s GP an organised, complete picture, so any decision about stopping, adjusting or continuing a medicine is made with the full list in view, by the person who knows their history best.4 That distinction matters: the review’s role is to surface what’s there and flag what’s worth a second look, not to make clinical calls on the GP’s behalf.
When is it worth raising this?
If your family member’s medicine list has grown gradually, involves more than one prescriber, or hasn’t had a proper whole-list review in the last year or so, that’s a reasonable moment to ask their GP about one. It’s worth raising sooner if you’ve also noticed changes like increased confusion or unsteadiness — our article on falls and medicines covers that connection specifically. And if a Webster pack is how your family member currently manages their tablets, it’s worth knowing that packing doses and reviewing whether they’re still the right medicines are two different things, which our article on what Webster packs can and can’t do explains in full. A Home Medicines Review is arranged through their GP and funded by the Australian Government, at no cost to your family.4
Not sure what to do next?
Tell me what’s going on with your family member’s medicines — I’ll call you back, usually the same day, and we’ll work out the next step together. No cost, no obligation.
References
- healthdirect, Medicines safety for older people: healthdirect.gov.au
- RACGP, Aged care clinical guide (Silver Book) — Polypharmacy: racgp.org.au
- Pharmaceutical Society of Australia, HMR and RMMR Fact Sheet for Medical Specialists: psa.org.au
- healthdirect, Home medicines review: healthdirect.gov.au