MAR chart management in UK care homes: practical tips to prevent errors
Medication rounds can be busy, unpredictable, and emotionally demanding — especially in a care home where you’re supporting people with complex needs, changing conditions, and sometimes distress or confusion. In the middle of that, the MAR chart (paper or eMAR) can start to feel like “just another form”.
But in reality, the MAR chart is one of your strongest safety tools. When it’s completed well, it helps the whole team give medicines safely and consistently. When it’s unclear or incomplete, it creates risk — not because staff don’t care, but because the system stops being reliable.
NICE’s guidance on managing medicines in care homes (SC1) focuses on safe processes, accurate record-keeping, supporting residents’ choices, and staff training and competency — all of which link directly back to MAR chart practice (NICE SC1). This blog brings those principles to life with simple, real-world MAR tips taken from our “MAR Chart Completion & Error Spotting” guide.
Why malnutrition and dehydration matter for medicines
If you work in a UK care home, you’re already juggling a lot: complex medicines, changing health needs, family expectations, inspections…the list goes on.
But there’s a quiet safety risk that often hides in plain sight:
Malnutrition + dehydration + multiple medicines = a perfect storm for harm.
NICE now estimates that 1 in 10 people over 65 are at risk of malnutrition, and the impact on medicines is far from trivial. It affects how drugs are absorbed, distributed, metabolised and excreted – in other words, how they work and how safe they are NICE CKS Adult Malnutrition, 2024.
This blog looks at what this means for care homes, and how you can build malnutrition and dehydration into everyday medicines safety.
Why malnutrition and dehydration matter for medicines
When you’re short of time on a medication round, it’s easy to focus on the MAR and miss the person in front of you.
But if that person is quietly losing weight, eating very little, or barely drinking, several things start to happen:
- Less body water (dehydration) means some drugs become more concentrated in the bloodstream.
- Less body fat and muscle (malnutrition) alters how medicines are stored and released.
- Reduced liver and kidney function can slow drug breakdown and excretion.
- Poor intake overall can make some medicines less effective, especially those relying on food or fluid for absorption.
NICE is clear that adults who are malnourished or at risk should have a personalised nutrition care plan and, where appropriate, coordinated input from dietitians, nurses, pharmacists and others NICE CKS.
Section summary (key points):
- The MAR chart is a safety tool, not just paperwork.
- NICE SC1 supports robust processes, accurate records, resident involvement, and staff competency (NICE SC1).
- Good MAR practice reduces risk during busy, real-world medication rounds.
In a care home, that means malnutrition and dehydration are not “extra” tasks – they’re core to safe medicines management.
- Malnutrition and dehydration directly change how medicines work.
- Older residents with frailty and multiple long‑term conditions are at particularly high risk.
- NICE recommends a structured approach: screening, care plans and regular monitoring.
- For care homes, nutrition and hydration are medication safety issues, not just “wellbeing nice‑to‑haves”.
Start with the “5 Rights” — every single time
Most medication errors don’t happen because someone sets out to do the wrong thing. They happen when things are rushed, interrupted, or assumed. The “5 Rights” are your pause button — a quick, structured check that helps you catch the common slips before they reach a resident.
Before administering any medicine, always check:
- Right resident
- Right medication
- Right dose
- Right route
- Right time
In practice, this is where you protect residents and protect staff too. If the MAR chart, label, or instructions don’t line up — stop, clarify, and only proceed when you’re sure. NICE’s focus on safe systems and accurate record-keeping supports this kind of consistent checking and clear documentation (NICE SC1).
- Use the 5 Rights as a deliberate “pause and check” step.
- Don’t rely on memory or routine — confirm what’s in front of you.
- If anything doesn’t match, stop and clarify before giving
Remember the “lesser known rights”: refusal, documentation, response
The 5 Rights are essential — but they’re not the whole story in care homes. Your MAR chart needs to reflect real life: people have preferences, they may refuse, and some medicines require follow-up to confirm they’ve worked.
The right to refuse
Every resident has the right to refuse medication. A refusal isn’t “bad behaviour” — it’s information. Your job is to respond professionally and kindly, record it clearly, and follow your home’s escalation pathway if refusals become continual (as highlighted in our guide). This aligns with NICE’s emphasis on supporting residents to make informed decisions and recording them appropriately (NICE SC1).
The right documentation
In care homes, medicines information is rarely held in just one place. Alongside the MAR/eMAR you may need to reference (and keep aligned with) additional documents such as:
- Controlled drug (CD) records
- Homely remedy guidance
- PRN protocols
- Topical application charts
If the MAR says one thing and the PRN protocol says another, or if a topical is being given but not recorded on the right chart, that’s exactly how confusion and errors creep in. The safer approach is to ensure the correct documents exist, are current, and are being used consistently — which matches NICE’s broader recommendations around policies, processes, and record-keeping (NICE SC1).
The right response
Some medicines are not “give and forget”. Pain relief, medicines for anxiety, and treatments for high temperature are common examples where you should be checking whether the medicine has had the intended effect — and documenting that response within your care home’s processes (as our guide prompts). This isn’t about extra admin for the sake of it; it’s about knowing whether a person is comfortable, safe, and improving.
- Refusal must be respected, recorded, and escalated appropriately if ongoing.
- Use the correct supporting documents (CD, PRN, homely remedies, topical charts) — not just the MAR.
- For certain medicines, record the resident’s response/outcome, not just the administration.
“Legibility is key”: if it can’t be read, it can’t be relied on
One of the most underestimated risks in MAR completion is poor handwriting or unclear entries. When a note is messy, squeezed in, overwritten, or ambiguous, it doesn’t just look untidy — it forces the next person to guess. And in medicines management, guessing is dangerous.
Our guide puts it bluntly: If you can’t read it, neither can anyone else.
Even in the best teams, unclear entries create friction: staff waste time double-checking, chasing clarification, or feeling anxious about whether something was done. Clear documentation supports continuity, reduces misunderstandings across shifts, and makes audits and reviews far more straightforward — all of which sit comfortably within NICE’s expectation that records are accurate and up to date (NICE SC1).
- Unclear/illegible entries increase risk and force others to guess.
- Clear, concise documentation protects residents and reduces staff stress.
- Aim for entries that another colleague can understand instantly.
Sign off immediately — never pre-sign, never “catch up later”
This is one of the simplest rules, and one of the most important: sign the MAR chart as soon as the medicine is administered.
Pre-signing (signing before giving) or signing later can lead to exactly the two outcomes nobody wants:
- Missed doses (because it looks like it was given)
- Double dosing (because it’s unclear whether it was given)
We understand why “I’ll do it in a minute” happens — interruptions are constant in care settings. But the MAR chart is a live safety record, and its value depends on real-time accuracy. NICE places strong emphasis on safe processes and staff competency in medicines administration, which includes reliable documentation habits like timely signing (NICE SC1).
- Sign immediately after administration.
- Avoid pre-signing or delayed signing to reduce missed/double doses.
- Treat the MAR as a live safety record, not a task for later.
Document everything: refusals, omissions, unusual observations — and follow policy
Know abbreviations — but if you’re unsure, spell it out
Abbreviations are common in healthcare, but they can be a hidden source of error — particularly for new staff, agency staff, or anyone covering a different unit. Our guide encourages staff to familiarise themselves with common abbreviations but always clarify if unsure. And when in doubt: spell it out.
This is a simple kindness to your future self and to colleagues: it reduces the risk of misinterpretation and keeps care consistent across shifts. It also supports NICE’s wider message about safe systems, accurate records, and staff training/competency (NICE SC1).
- Abbreviations can be misunderstood — especially across teams/shifts.
- Clarify uncertain terms and favour plain language where possible.
- “When in doubt, spell it out.”
Question discrepancies: stop and check — don’t proceed until you’re certain
This is the error-spotting mindset that keeps residents safe: if something on the MAR chart doesn’t look right, pause.
Our guide lists examples like:
- a missing signature
- an unusual dose
- an unclear instruction
In those moments, the safest action is to stop, question it, and seek clarification through the appropriate route (senior on shift, prescriber, supplying pharmacy, or according to local policy). This is not “being difficult” — it’s professional curiosity and care.
NICE SC1 supports safe medicine administration and medicine-related problem identification — and that starts with staff feeling confident to raise concerns and resolve uncertainties rather than “just carrying on” (NICE SC1).
Section summary (key points):
- Treat anything unclear as a red flag, not a minor inconvenience.
- Stop and clarify missing signatures, unusual doses, unclear instructions.
- Don’t proceed until you’re certain.
Regular training: knowledge really is power
Finally, it’s worth saying clearly: MAR quality is not just about individual effort — it’s about training, competency, and systems.
Our guide encourages care homes to stay up to date with medication management policies and attend refresher training. NICE SC1 also includes recommendations about training and competency of care home staff (NICE SC1). When training is consistent, documentation becomes consistent — and that’s when medication rounds become safer and calmer for everyone.
- Ongoing refresher training strengthens MAR consistency and safety.
- Align practice with up-to-date policies and competency expectations (NICE SC1).
- Safer systems support staff wellbeing as well as resident safety.
Final takeaways (quick checklist)
- ✅ Always check the 5 Rights before administering medication
- 🛑 Respect and record the right to refuse, escalate ongoing refusals appropriately
- 📄 Use the right documentation (MAR/eMAR + CD books, PRN protocols, homely remedies, topical charts)
- 🩺 Capture the right response where monitoring is needed (pain, anxiety, temperature)
- ✍️ Keep entries legible and unambiguous
- 🖊️ Sign off immediately — never pre-sign or sign later
- 📝 Document everything (refusals, omissions, unusual observations) and follow policy
- ❓ Question discrepancies — don’t proceed until you’re sure
- 🔁 Commit to regular training and policy updates
Source notes
- NICE “Care homes” guidance hub: NICE – Care homes
- NICE SC1 “Managing medicines in care homes”: NICE guideline SC1
