If you prescribe in EMIS or SystmOne, OptimiseRx prompts are part of your day: a message appears as you prescribe, suggesting a safer, more appropriate or more cost-effective option. Used well, these prompts prevent genuine harm and save the NHS large sums. Used badly, they become background noise that gets clicked away, taking the important messages with them. The core skill is not obeying prompts or ignoring them, but responding to each one with judgement, and recognising that a safety alert and a cost-switch alert are not the same thing. This is a detailed guide to what OptimiseRx does, why alert fatigue matters, and how to handle prompts well.
In brief: FDB OptimiseRx is a patient-specific prescribing decision-support tool integrated into EMIS and SystmOne, used across more than 4,500 GP practices, delivering safety, best-practice and cost-effectiveness messages at the point of prescribing. A prompt is decision support, not an instruction: clinicians should read each message, distinguish safety from cost prompts, judge it against the individual patient, and neither accept nor override reflexively.
Key takeaways
- OptimiseRx delivers patient-specific prescribing prompts in EMIS and SystmOne across more than 4,500 practices.
- It has helped the NHS save over £500 million since 2014 and has prevented documented harm.
- A prompt is decision support, not a mandate, and the clinician remains accountable for the decision.
- Safety prompts and cost prompts deserve different weight, and treating them identically is a mistake.
- Alert fatigue is real, so the goal is judged responses, not reflexive acceptance or reflexive override.
What OptimiseRx is
FDB OptimiseRx, from First Databank, is the leading medicines optimisation and prescribing decision-support tool in UK primary care, integrated directly into the prescribing workflow of EMIS Web and SystmOne. It is used in more than 4,500 GP practices covering over 44 million patients, and FDB reports it has facilitated over £500 million in NHS cost savings since it launched in 2014. Its distinguishing feature is that it is patient-specific: it reads the coded patient record, considering current and previous medications, conditions, observations and measurements, and fires a message only when the prescription may not align with best practice for that individual. Its content is drawn from national sources including NICE, MHRA drug safety updates, NHS England, the RCGP and prescribing safety indicators, combined with locally authored formularies, so the prompts reflect both national evidence and local policy.
How it works, and what it does well
The value is genuine and, in places, striking. Because OptimiseRx is patient-specific rather than firing blanket warnings, it can catch real, individualised risks: independent analysis has credited it with helping prevent thousands of falls in older patients, reducing acute kidney injury risk from NSAID and diuretic combinations, and flagging ineffective antibiotic choices such as nitrofurantoin in severe renal impairment. Alongside these safety wins, it supports formulary adherence, reduces medicines waste, and gives medicines optimisation teams analytics to understand and improve prescribing across an area. For the specific, coded, rule-based risks that a busy prescriber can miss, it is a valuable safety net, and the patient-specificity is what makes it more useful than the blunt, over-firing alerts of older systems.
Why alert fatigue still matters
Even a well-designed, patient-specific system generates alert fatigue, and it is worth being honest about this. FDB explicitly designs OptimiseRx to reduce fatigue by only presenting relevant messages, and that helps, but no prompting system eliminates it. When prompts appear regularly, the human tendency is to develop a reflex to dismiss them, and once that reflex forms, it does not discriminate: the occasional critical safety message is clicked away with the same speed as the routine cost switch. This is the central danger of any alerting system. The purpose of the prompts is defeated not by the prompts themselves but by the habituation they create, and guarding against that habituation is a clinical discipline, not a software setting.
Safety prompts and cost prompts are not the same
Here is the distinction that most improves how you use OptimiseRx. Its messages broadly fall into safety and best-practice prompts on one hand, and cost-effectiveness prompts on the other, and they deserve different weight. A safety prompt, flagging a dangerous interaction, a contraindication in this patient, or an ineffective choice given their renal function, is a message to take seriously and usually act on or consciously justify overriding. A cost prompt, suggesting a cheaper equivalent, is a reasonable nudge but is legitimately overridden when there is a patient-specific reason to prefer the current option, such as tolerability, adherence, or a previous adverse experience. Treating every prompt with the same reflex, whether that reflex is to accept or to dismiss, is the error. Reading which kind of message it is, and weighting it accordingly, is the skill.
A prompt is not an instruction
This is the principle underneath all of it. OptimiseRx is decision support, and a message is a prompt to consider, not a mandate to obey. The tool sees the coded record, but it does not see everything: it does not know the conversation you just had, the patient's preferences, the subtle reason the current drug was chosen, or the clinical context that a code cannot capture. So the two failure modes are equal and opposite. Accepting every prompt uncritically outsources your judgement to a rule engine that lacks the full picture. Overriding every prompt reflexively wastes a genuine safety net and ignores real risk. The correct posture is in between: engage with each prompt, apply it to the individual in front of you, and make, and be able to justify, a clinical decision. Accountability for the prescription remains yours, whatever the prompt says.
How to respond to prompts well
In practice, a simple discipline works. When a prompt appears, read it rather than reflexively clicking, and classify it: is this a safety or a cost message? For a safety prompt, take it seriously, check it against the patient, and either act or consciously document why not. For a cost prompt, consider it, and override with a clear reason where a patient-specific factor justifies the current choice. Where a prompt raises a question you are unsure about, whether the alternative is truly appropriate for this patient, what monitoring it needs, or how it interacts, that is the moment to check rather than guess. And at a practice level, medicines optimisation teams can tune the message profile to keep prompts relevant and reduce noise, which protects the signal for everyone.
Where iatroX fits
OptimiseRx tells you a prescription may need reconsidering; it does not always tell you what the right answer is for this patient. That is where iatroX helps: when a prompt raises a clinical question, Ask iatroX gives a guideline-grounded answer from NICE, CKS, SIGN and the SmPC with the source attached, so you can check whether the suggested alternative is appropriate, what monitoring or interactions apply, and how the guidance reasons about it, before you accept or override. It complements the prompt by supplying the reasoning the prompt assumes, and it turns a routine alert into a moment of genuine learning. Try it at Ask iatroX. For the supply pressures that increasingly force prescribing changes, see medicine shortages in UK primary care, and for how these tools fit together, the hidden GP software stack.
Frequently asked questions
What is OptimiseRx? FDB OptimiseRx is a patient-specific prescribing decision-support tool integrated into EMIS and SystmOne, used across more than 4,500 GP practices. It reads the coded patient record and delivers safety, best-practice and cost-effectiveness prompts at the point of prescribing, drawn from national guidance and local formularies.
Do I have to follow an OptimiseRx prompt? No. A prompt is decision support, not an instruction. You should read it, judge it against the individual patient, and act or override with a clear clinical reason. Accountability for the prescription remains with you, not the tool.
How do I avoid alert fatigue? By responding to prompts with judgement rather than a reflex. Read each message, distinguish safety from cost prompts, and take safety messages seriously. At practice level, medicines optimisation teams can tune the message profile to keep prompts relevant and reduce noise.
Is it safe to override OptimiseRx messages? It can be, for cost or best-practice prompts where a patient-specific reason justifies the current choice, provided you have considered the message. Safety prompts warrant more caution and a documented rationale if overridden. The key is a judged decision, not a reflexive one.
What is the difference between safety and cost prompts? Safety and best-practice prompts flag potential harm, such as interactions or contraindications in this patient, and should usually be acted on or consciously justified. Cost prompts suggest cheaper equivalents and are reasonably overridden when tolerability, adherence or clinical context favours the current option.