Does a dosage system work for a person with dementia living alone?
When an SPD is enough in dementia, what the pharmacy requires, which support completes it and which signs show that someone is now needed at every dose.
In short
- An SPD is a great help for organising medication, but for a person with dementia who lives alone it is not enough on its own.
- Pharmacy good practice requires a reference person when the person has reduced functional capacity.
- In the early stages it can work with reminders and checks; in advanced stages someone is needed at every dose.
- Checking the blister pack regularly is the simplest way to know whether medication is being taken properly.
An SPD does work for a person with dementia who lives alone, but only as part of a plan: the pharmacy organises the medication and a reference person checks that it is taken. Without that support, the blister pack alone does not prevent missed or repeated doses.
We explain when it is enough, what the pharmacy needs, which support completes it and how to tell when someone needs to be present at every dose.
What does a dosage system solve, and what does it not?
An SPD (personalised dosage system) is a blister pack prepared by the pharmacy with the medication sorted by day and time of each dose. It solves the organising part: the person no longer has to open boxes, count tablets or remember what to take when.
What it does not solve is remembering to take it, understanding that they need to, or not taking two pockets in a row. In a person with dementia, these are exactly the problems that start to appear. To learn more about the system, read what an SPD is.
Is a dosage system enough for a person with dementia who lives alone?
It depends on the stage of dementia and on who supports the person. In the early stages, an SPD combined with reminders and regular checks may be enough; as the condition progresses, someone needs to supervise the doses, and in advanced stages someone needs to give them.
The good practice guide from the Spanish General Council of Pharmacists excludes from the SPD service people with reduced functional capacity who have no reference person responsible for them. In other words, the SPD is designed for these situations, but with a relative or carer behind it. The Alzheimer's Society also warns that reminders tend to become less effective as dementia develops.
| Situation | Is the SPD enough? | Support usually needed |
|---|---|---|
| Mild impairment, keeps routines | Often yes, with supervision | Reference person, alarm or call at dose time, weekly check of the blister pack |
| Frequent forgetting or mixing up days | Not on its own | Someone checking every day, telecare, consider a carer |
| Moderate or advanced dementia | No | A person who gives the medication at every dose |
What does the pharmacy need to prepare an SPD?
The pharmacy needs the complete, up to date treatment, signed consent and, for people with difficulties, the details of a relative or carer to contact. According to the good practice guide, the SPD is usually prepared for one week and no more than four should be handed over at once.
- Informed consent: signed by the person or their legal representative, carer or relative.
- Reference person: name and phone number of whoever looks after them.
- Treatment information: what they take, at what dose and who prescribed it.
- Return of used blister packs: the guide recommends handing back previous weeks' packs to check whether doses were taken.
Not everything fits in an SPD. Oral tablets and capsules can be prepared, but not syrups, drops, patches, sachets, inhalers, effervescent or orodispersible tablets, or medicines that need refrigeration, which will have to be organised separately.
Which kinds of support complement the dosage system at home?
The most useful are those that give a reminder at dose time and those that let someone check afterwards that it was taken. Combined with the SPD, they greatly reduce the risk of missed and repeated doses.
- A daily phone or video call at the time of the main dose.
- Simple alarms or pill boxes with an alert, while the person still responds to them.
- Telecare, which Royal Decree 675/2023 recognises as an entitlement for people with recognised dependency.
- Visits from the home help service or a carer at key times.
- Moving old medication or medicines they no longer take out of reach, to avoid confusion.
The Spanish Ministry of Health consensus document (2026) notes that people with cognitive impairment have twice the risk of falls and mentions pharmacy-prepared pill organisers as a way to prevent dosing errors.
When is it no longer safe for them to take medication alone?
When there are repeated signs that they cannot follow the blister pack: full pockets from past days, empty pockets from future days, loose tablets around the house or symptoms getting worse for no reason. At that point, the medication needs someone present at every dose.
- Check the blister pack at every visit and note what you find.
- Discuss your findings with the GP, who may simplify the treatment or reduce the number of doses.
- Talk to social services about a dependency assessment, home help or a carer.
- If they refuse their medication, do not hide it in food without advice: read our guide on what to do if an older person refuses medication.
A practical example: Carmen and her nine medicines
Take the case of Carmen, 82, who has mild Alzheimer's disease, lives alone and takes nine medicines. Her son, who lives 20 minutes away, sometimes finds tablets on the floor and does not know whether she has taken her evening ones.
A reasonable plan would be to ask the pharmacy to prepare her medication in a weekly SPD with her son as the reference person, call her every evening at dose time, check the blister pack twice a week and ask the GP whether any medicine could be simplified. If, a few months later, several days' pockets are found empty at once, it will be time for someone to be present at every dose. For other aspects of care, see how to cope with a relative's Alzheimer's disease.
How can IMA Health help?
At IMA Health we coordinate with a specialised pharmacy so that medication is prepared by day and time of each dose and delivered to the home, with personalised follow-up. We work with the family as the reference person, so that the SPD comes with the support a person with dementia needs.
Sources
- Spanish General Council of Pharmacists: Good Practice No. 14, personalised dosage system service
- Spanish Ministry of Health: consensus document on frailty and falls in older people (2026)
- BOE: Royal Decree 675/2023 (telecare within the dependency system)
- Alzheimer's Society: taking medications with dementia
This article is for information only and does not replace advice from your doctor or pharmacist.