Why a “Medicines Brown Bag” audit matters (and why it’s trending)
Across Aotearoa New Zealand, more people are living with long-term conditions and taking multiple medicines. That’s often necessary, but it also increases the risk of mix-ups, duplicate therapies, interactions, and side effects that can quietly undermine health. A “Medicines Brown Bag” audit is a simple, structured review where you gather every medicine you use—prescription, pharmacy-only, over-the-counter (OTC), vitamins, herbal products—and check them against what you should be taking.
This approach is increasingly recommended in primary care and community pharmacy because it’s practical, fast, and produces results you can act on immediately. International evidence also shows polypharmacy and medication errors are common drivers of avoidable harm. The goal isn’t to stop medicines abruptly—it’s to ensure every item has a clear purpose, the dose is right, and your care team has an accurate, up-to-date list.
Below is a step-by-step, at-home guide you can follow before your next GP, nurse, or pharmacist appointment. It’s designed to reduce risk, improve symptom control, and help you get the full benefit of the medicines you’re prescribed.
Step-by-step: How to do a Medicines Brown Bag audit
1) Pick the right time window (and set a clear goal)
Choose a time when you’re not rushed—30 to 60 minutes is usually enough. Your goal is to produce two things:
- A single, accurate medicines list (including non-prescription items).
- A shortlist of questions for your pharmacist, GP, or nurse.
Actionable tip: If you’ve had a recent hospital visit, new diagnosis, or dose change, do this audit within 7 days. Those transitions are when errors are most likely to occur (for example, an old medicine accidentally continued).
2) Gather absolutely everything you take—no exceptions
Get one bag or box and collect:
- All prescription medicines (tablets, inhalers, creams, eye drops, injections).
- OTC pain relief (paracetamol, ibuprofen, aspirin), cold/flu products, antacids.
- Vitamins, minerals, sports supplements, herbal remedies (e.g., St John’s wort).
- As-needed medicines (e.g., migraine, nausea, sleep aids).
- Old packets “just in case” (these often cause accidental double dosing).
Real-world example: It’s common to find two products containing paracetamol—one labeled as pain relief, another as a cold/flu remedy. That duplication can push daily totals higher than intended.
3) Create a master list in plain language
On paper or your phone, write each item with:
- Name (brand and, if you can, generic).
- Strength (e.g., 20 mg, 500 micrograms, 5 mg/5 mL).
- Directions (how you take it in real life, not just what the label says).
- Reason (what it’s for—blood pressure, reflux, arthritis pain, etc.).
- Start date and whether it’s short-term or ongoing.
Actionable tip: If you don’t know why you’re taking something, write “unknown.” That’s a high-priority question for your next review.
4) Check for duplicates and “same drug, different name” issues
Look for medicines that treat the same condition, or the same active ingredient appearing under different brand names.
- Two NSAIDs at once (e.g., ibuprofen + diclofenac) can increase stomach, kidney, and blood pressure risk.
- Multiple sedating medicines (some antihistamines, sleep aids, anxiety meds) can compound drowsiness and falls risk.
Real-world example: A person with seasonal allergies may take a sedating antihistamine at night and a cough mixture with sedating ingredients—then wonder why they feel “foggy” the next morning.
5) Use a “high-risk medicines” lens
Some medicines are more likely to cause harm if taken incorrectly. Flag these on your list so you ask extra questions about monitoring, timing, and missed doses:
- Blood thinners (e.g., warfarin, dabigatran, rivaroxaban, apixaban).
- Insulin and diabetes medicines that can cause low blood glucose.
- Opioid pain medicines (risk of sedation, constipation, dependence).
- Strong heart medicines (some require careful dose timing).
- Multiple inhalers (mixing up preventer vs reliever is common).
Actionable tip: If you’re on a blood thinner, add your typical diet patterns (e.g., changes in leafy green intake) and any new supplements to your notes—these can matter.
6) Map your real-day schedule and identify “collision points”
Draw a simple day timeline (morning, midday, evening, bedtime) and place each medicine where you actually take it. Now look for:
- Too many doses at one time (hard to sustain long-term).
- Food-sensitive medicines being taken inconsistently with meals.
- Spacing problems (e.g., antacids close to some antibiotics or iron).
Real-world example: If you take levothyroxine, iron, and calcium, timing can matter. A practical schedule might separate thyroid medicine from mineral supplements by several hours (confirm specifics with your pharmacist).
7) Do a side-effect and symptom “pattern check”
For 7 days, track:
- New symptoms (dizziness, nausea, bruising, swelling, cough, sleep changes).
- When they happen (after a dose, after meals, at night).
- Any missed doses and what changed.
This isn’t about blaming the medicine—it’s about spotting patterns your clinician can use to fine-tune treatment.
Data point: Medicines are a common reason for potentially preventable harm in the community—especially when multiple medicines, alcohol, dehydration, or acute illness (like gastro) are involved. A short symptom log can provide the missing context that labels and dispensing records don’t capture.
8) Check expiry dates, storage conditions, and device technique
Medication safety isn’t only about what you take—it’s also about whether the product is still effective and used correctly.
- Expiry: Remove expired items and set them aside for safe return to a pharmacy.
- Storage: Heat, moisture, and sunlight can degrade some medicines. Bathrooms are often too humid.
- Inhalers and spacers: Technique errors are common and can make a preventer seem “ineffective.”
- Eye drops: Note the open-date; some should be discarded after a set period once opened.
Actionable tip: If you use an inhaler, ask your nurse or pharmacist to watch you take 1–2 puffs. A 60-second technique check can significantly improve symptom control without changing the prescription.
9) Run an interaction and safety “sense check” using reputable resources
Don’t rely on social media lists or anonymous forums. Use reputable, clinician-backed information when you have questions about side effects, interactions, and safe use. For a general, trustworthy overview of medication safety and how to use medicines wisely, you can consult Mayo Clinic’s patient education resources and then bring your specific questions to your local pharmacist or prescriber.
Important: Online information should support—not replace—professional advice. If you suspect a serious reaction (e.g., trouble breathing, swelling of lips/face, chest pain), seek urgent help immediately.
10) Prepare a “pharmacist/GP-ready” question list and book the right review
Turn your audit into action by writing 5–10 targeted questions. Examples:
- “Which of these are still necessary, and which were meant to be short-term?”
- “Am I taking any duplicates or medicines that overlap?”
- “What monitoring do I need (blood tests, blood pressure, kidney function) and how often?”
- “Which side effects should I watch for, and what should I do if they happen?”
- “Can we simplify timing so it’s easier to follow?”
Real-world example: If you’re on three blood pressure medicines and still experiencing headaches and dizziness, your clinician may adjust timing, check hydration, review other contributors (like NSAID use), or simplify dosing to improve adherence.
When you book, ask specifically for a medicines review. Bring:
- Your master list (printed or on your phone).
- Your 7-day symptom log.
- All medicines in the original packaging if possible.
Extra safety checklist (quick wins that prevent common errors)
- One pharmacy where possible: Dispensing history in one place can reduce duplication and interaction risk.
- Keep an updated list in your wallet or phone: Include allergies and intolerances.
- Know your “must not miss” medicines: Ask which ones are time-critical.
- Plan for sick days: If vomiting/diarrhoea occurs, some medicines may need special advice—ask in advance.
- Never stop abruptly without advice: Some medicines require tapering or substitution.
Conclusion: Make medicine safety a routine, not a crisis response
A Medicines Brown Bag audit is one of the highest-value, lowest-cost health checks you can do at home. By gathering every product, building a master list, spotting duplicates, tracking side effects, and bringing a focused question set to your pharmacist or GP, you reduce risk and improve the chance that each medicine is doing what it was intended to do.
If you haven’t done a full review in the past 12 months—or your medicines changed recently—schedule one now. The payoff is practical: fewer surprises, better symptom control, and greater confidence that your treatment plan matches your life.
