Taking medication regularly: Why so many doses are missed and what actually helps
Taking medication regularly sounds simple, but many people struggle with it. Studies show why: most of the time it's plain forgetting, sometimes a quiet doubt. And they show what helps — and what surprisingly doesn't.
It's Tuesday morning, just after seven. Your blood pressure pill is where it always is, next to the coffee machine — you've already got the pack in your hand. Then the phone rings, the kids are hunting for their trainers, and half an hour later you're in the car. Somewhere mid-morning the question comes: did I actually take it today? You don't know. And you don't know what the right thing to do is now.
If that sounds familiar, you're in very good company. Not taking medication as prescribed is one of the most common problems in medicine. It rarely comes down to carelessness. Usually it's a full daily life, sometimes an uneasy feeling about the tablet, and often both.
We looked at what the World Health Organization (WHO) and major review studies know about taking medication regularly: how often doses are missed, why it happens, and which solutions have actually worked in studies. Some of the findings may surprise you. By the end, you'll know what you can adjust yourself — and when it's better to talk to your doctor or pharmacist.
How often is medication not taken as prescribed?
Very often. The WHO estimated in 2003 that people with chronic conditions in high-income countries follow their treatment as prescribed only about 50 percent of the time on average. A 2014 Cochrane review of 182 studies found that people typically take only about half of their prescribed doses.
The WHO presented its report "Adherence to long-term therapies" on 1 July 2003. The figure of around 50 percent is an average across many conditions, and the range behind it is wide. For high blood pressure, the WHO reported adherence of 27 percent in Gambia, 43 percent in China, and 51 percent in the USA. For depression, figures ranged between 40 and 70 percent; for asthma, 43 percent for acute treatment and 28 percent for long-term treatment.
The 2014 Cochrane review by Nieuwlaat and colleagues is the most comprehensive analysis of studies aimed at improving medication adherence. The very first sentence states that people typically take only about half of their self-administered prescribed doses. Cochrane is an international network that synthesises studies according to rigorous standards.
It's important to understand how these numbers should be read. They depend heavily on how adherence is measured: with questionnaires, by counting tablets, using pharmacy records, or with electronic pill caps that log every opening. The exact percentages therefore vary from study to study. But the direction is the same everywhere: a lot is lost between the prescription and the tablet actually taken.
What does medication adherence mean?
Adherence means taking a medication the way you and your doctor have agreed. A European research group divided it into three phases in 2012: starting the medication, taking it consistently day to day, and stopping. Something can go wrong in each phase, and each requires a different kind of support.
The older term was compliance — meaning following instructions. That word carries a sense of obedience and is used less often now. Adherence, by contrast, emphasises that the patient and doctor agree on the plan together. The European ABC project led by Bernard Vrijens found more than ten different terms for the same behaviour in the British Journal of Clinical Pharmacology in 2012 — often with different meanings — and therefore proposed a clear framework.
The first phase is initiation: is the prescription filled at all and is the first dose taken? The second is implementation in everyday life: is the right amount taken at the right time each day? The third is discontinuation: when does someone stop, even though treatment should continue? The table shows what studies have measured for each phase.
This distinction is more than word-splitting. Someone who never fills a prescription needs a different conversation than someone who misses every third evening dose. And someone who stops after a few months often has reasons that only come out when you ask.
| Phase | What it means | A measured value | Source |
|---|---|---|---|
| Initiation | Fill the prescription, take the first dose | 28% of prescriptions for new medications were never filled (195,930 e-prescriptions, USA) | Fischer 2010 |
| Implementation | Take the right amount at the right time each day | Around 10% of planned doses were missed each day (4,783 people with high blood pressure) | Vrijens 2008 |
| Discontinuation | Stopping even though treatment should continue | Around half had stopped their blood pressure medication within a year | Vrijens 2008 |
The framework comes from the European ABC project (Vrijens 2012). The measured values come from two studies with different populations and are not directly comparable.
How many prescriptions are never filled at all?
More than you might think. In a US study of 195,930 electronic prescriptions, 22 percent were never collected from the pharmacy — rising to 28 percent for newly prescribed medications. For new medications for high blood pressure, high cholesterol, and diabetes, the proportion was between 28 and 31 percent in each case.
Fischer and colleagues analysed one year of electronic prescriptions from 75,589 patients prescribed by 1,217 doctors, published in the Journal of General Internal Medicine in 2010. Of 82,245 prescriptions for new medications, 58,984 were filled — 72 percent. The highest rate was among children and young people up to age 18, at 87 percent.
Striking is which medications were left uncollected: 28.4 percent of new blood pressure medications, 28.2 percent of cholesterol-lowering medications, and 31.4 percent of diabetes medications were never picked up. These are conditions you often don't feel. When you feel healthy, there's less of a reason to start taking a tablet.
The study comes from the USA, where co-payments play a bigger role than in many European countries. Other researchers also noted in a letter to the same journal that the figures might be inflated. The core finding still stands: the step from prescription to first tablet is its own hurdle. If you don't want to fill a prescription, tell your doctor. Then you can look for the reason and alternatives together.
Why do people forget their medication?
The most common reason is simply forgetting. In a study of 261 adults taking blood pressure medication, respondents cited forgetting in 39.5 percent of cases, lack of time in 23.7 percent, and travel in 19.7 percent. Whether someone skipped doses varied considerably from week to week.
Voils and colleagues called people taking at least one blood pressure medication four times, roughly two weeks apart, without advance notice, asking whether they had missed any doses the previous week and why. The results were published in the journal Patient Preference and Adherence in 2014. In 152 of 871 calls — 17.5 percent — respondents reported skipped doses, affecting 93 of the 261 participants, more than one in three.
One detail is particularly telling: half of the variation was down to the same person forgetting more in some weeks and less in others. The other half came from differences between people. So there aren't simply reliable people and forgetful people. There are good weeks and weeks when daily life throws everything off.
Experts therefore distinguish two types. Unintentional non-adherence happens through forgetting, time pressure, or a break in routine — on holiday, for example. Intentional non-adherence is a deliberate choice, for instance because of side effects or doubts about the benefit. The first kind calls for reminders and fixed routines; the second calls for an open conversation.
What role do doubts and worries play in taking medication?
A big one. A 2013 review of 94 studies involving 25,072 people with long-term conditions found: those who believed their medication was necessary were significantly more likely to take it as prescribed. Those who worried about potential harm were significantly less likely to. Both can be addressed in a conversation with your doctor.
Horne and colleagues at University College London synthesised studies in PLOS ONE that all used the same questionnaire, the "Beliefs about Medicines Questionnaire". It asks how necessary someone considers their medication and what concerns they have about it. Those who saw greater necessity had around a 74 percent higher chance of good adherence (odds ratio 1.74). Those with more concerns had roughly half the chance (odds ratio 0.50).
An odds ratio compares the chances of two groups. A value above one means a higher chance, a value below one means a lower chance. The associations remained stable regardless of study size, country, or how adherence was measured.
For you, this means: if you have doubts, they're not a sign of ingratitude — they're an important topic to raise. Ask what the medication is actually for, how you'd know if it's working, and what can be done about side effects. The authors explicitly recommend that doctors take their patients' beliefs into account when prescribing. But never stop a medication on your own.
Does taking medication regularly affect how long you live?
People with good adherence die less often in studies, but not only because of the medication. A 2006 review of 21 studies with 46,847 participants found significantly fewer deaths with good adherence, with an odds ratio of 0.56. The same difference appeared with placebo medications, suggesting that adherent people tend to have an overall healthier lifestyle.
Simpson and colleagues at the University of Alberta published this review in the British Medical Journal in 2006. For good versus poor adherence, the odds ratio for death was 0.56. The interesting part comes from eight studies with 19,633 participants where some people received a placebo — a tablet with no active ingredient. Those who took the placebo reliably also died less often, again with an odds ratio of 0.56.
The technical term for this is the "healthy adherer effect": people who take their tablets regularly also tend to live healthier lives in general — they exercise more, attend check-ups, and eat more mindfully. Regular adherence is partly a sign of an overall careful approach to one's own health.
This doesn't mean medications don't work. For drugs with proven benefit, good adherence was associated with a similarly lower risk of death. But the study also reveals a flip side: for drugs that turned out to be harmful in certain studies, good adherence was associated with higher risk. This is why adherence includes regularly reviewing whether a medication is still the right one — together with your doctor.
Does it help to take fewer tablets per day?
Yes, as shown by electronic pill cap measurements. In a review of 76 studies, an average of 79 percent of doses were taken with once-daily dosing, compared to just 51 percent with four-times-daily dosing. Whether your regimen can be simplified is not your decision alone — discuss it with your doctor.
Claxton and colleagues reviewed only studies that measured adherence electronically in Clinical Therapeutics in 2001. A chip in the bottle cap logs each opening with a timestamp. This is considered more accurate than questionnaires or counting tablets. The study was conducted at a pharmaceutical company, which is worth keeping in mind.
The more doses required per day, the fewer were actually taken. The difference between once and twice daily was not statistically clear, however — it only became pronounced from three and four times daily. Timing fared even worse: in 14 studies that also recorded the time of day, only 59 percent of doses on average were taken within the intended time window.
Some medications come in a version that needs to be taken less often, or as a combination of several active ingredients in one tablet. Whether that's an option for you depends on your condition and your medications. Saying "I find it hard to remember the midday dose" is a good starting point at your next appointment.
| Doses per day | Average doses taken |
|---|---|
| Once | 79% |
| Twice | 69% |
| Three times | 65% |
| Four times | 51% |
Source: Claxton, Cramer and Pierce, Clinical Therapeutics 2001. Review of 76 studies in which adherence was measured with electronic pill caps. The range across studies was wide, from 34 to 97 percent.
Do phone reminders help with taking medication?
In studies, yes. A 2016 review of 16 studies with 2,742 participants found that text message reminders roughly doubled the chance of taking medication as prescribed. The researchers estimated that adherence could rise from an assumed 50 percent to nearly 68 percent. Most studies, however, ran for only a few weeks.
Thakkar and colleagues published this review in JAMA Internal Medicine in 2016. A meta-analysis combines the results of many studies into a single overall figure. Here the odds ratio was 2.11. When only higher-quality studies were counted, the effect was smaller but still clearly present at 1.67.
The authors name the limitations themselves: the studies lasted an average of just twelve weeks, and adherence was mostly self-reported rather than measured. Knowing you're in a study may lead people to report better behaviour than they actually exhibit. Whether the effect holds over months and years, and whether it improves health outcomes, remains to be seen.
Even so, the finding fits the most common reason for missed doses. If forgetting is the main problem, a prompt at the right moment makes sense. A reminder doesn't replace a doctor's instruction. The time should match what applies to your medication — for example, on an empty stomach, with food, or in the evening.
Do weekly pill organisers and pill boxes help?
On their own, apparently not much. In a large US study with 53,480 participants, people who were taking their medication irregularly received a pill organizer, a cap with a time display, or a bottle strip to check off by post. After one year, no more people were taking their medication reliably than in the group without any aids.
The REMIND study by Choudhry and colleagues was published in JAMA Internal Medicine in 2017. Eligible participants were 18 to 64 years old, taking one to three oral medications for long-term conditions, and had collected only 30 to 80 percent of their packs in the previous year. Adherence was tracked for one year via pharmacy data — measuring who had at least 80 percent of their medications in stock.
The results were sobering: 15.5 percent reached this target with the classic pill organizer, 15.1 percent with the timed cap, 16.3 percent with the check-off strip, and 15.1 percent with no aid at all. None of the differences from the comparison group were statistically significant. Several employees of the pharmacy company that supported the study were among the authors.
Does this mean a weekly pill organizer is useless? Not necessarily. The devices arrived by post without any conversation or guidance, and no one checked whether they were actually used. The researchers themselves suspect they might work better when combined with support. A device alone, however, does not appear to change habits. If you fill a weekly organizer, ask your pharmacist which medications are suitable for that.
How does taking medication become a habit?
By linking it to something you already do every day. The largest review — covering 771 studies — found in 2017 that the strongest effects came from approaches targeting habits and behaviour, not from education alone. In one habit formation study, it took an average of 66 days for a new daily action to become automatic.
Conn and Ruppar from the University of Missouri reviewed 771 studies on medication adherence support in Preventive Medicine in 2017. Overall, these interventions improved adherence, but only modestly; the authors write that much room for improvement remains. The best results came from supports that targeted habits and concrete behaviour — for instance, linking the dose to a fixed moment in the daily routine. Supports that primarily aimed to change knowledge and beliefs worked less well. Especially effective were personal conversations, particularly with pharmacists.
How long it takes for such a link to stick was studied by a team led by Phillippa Lally at University College London. In 2010, 96 students chose a new healthy behaviour and linked it to a fixed daily trigger — for example, eating a piece of fruit at lunch. On average, the behaviour ran largely automatically after 66 days, though the range varied from 18 to an estimated 254 days depending on the person. A single missed day made little difference.
The study didn't look at medication, but the principle transfers. A trigger could be brushing your teeth, your first cup in the morning, or dinner. Before you link a dose to a meal or a drink, check with your pharmacist whether your medication should be taken on an empty stomach, with food, or with a gap before certain drinks. Some medications don't mix well with coffee or milk.
Interactions with food and supplements
What should you do if you've forgotten to take your medication?
It depends on the medication — there's no one rule for everything. Check the package leaflet or ask your pharmacist what applies when a dose is missed. Don't double up without checking first. If you notice you're regularly skipping doses, talk to your doctor.
For some medications it makes sense to take the missed dose, for others it's better to skip it, and for some it depends on how many hours until the next dose. Many package leaflets have a dedicated section on what to do if a dose has been forgotten. For medications with a narrow dosing window — such as anticoagulants — it's worth noting this rule in advance.
What matters more than any single forgotten tablet is the pattern. In the 2008 study by Vrijens and colleagues of 4,783 people with high blood pressure, 43 percent of missed doses were part of gaps lasting several days, and almost half of participants had at least one such gap per year. People who took their tablets less reliably day to day were also more likely to stop entirely.
The 2014 Cochrane review gives an honest conclusion: existing interventions are mostly complex and work only moderately; there is no simple solution for everyone. The most effective approaches combined multiple elements and supported people over a longer period, often through pharmacists. An open conversation about your gaps is therefore not an admission of failure — it's the first step towards a plan that fits your life.
How the YUTHI app helps you
The YUTHI app has a dedicated Medications section. It only appears if you enable it during onboarding or later — disabling it deletes nothing. There you keep a list with the name, dose, time of day, and schedule for each of your medications: daily, every second, third, or seventh day. The app does not suggest a dose or a time. Only what you or your prescription say goes in.
For each medication you can enable a reminder at your chosen time. The notification includes a "Taken" button that logs the dose directly, and every reminder carries a note that it does not replace a doctor's instruction. If you haven't allowed YUTHI notifications in your phone settings, the app tells you, so you don't rely on a silent alarm.
Under Analysis you can see your adherence: what share of your planned doses you've checked off in the past seven days, shown as a weekly bar. Only what you've actually checked off is counted — honestly. The history shows when you took what. You can also mention new medications in the chat or photograph the packaging; your Coach reads the name and strength and checks with you before anything is added to the list.
For your next doctor's appointment you can generate a PDF report with your list and your adherence, which you can share by email, AirDrop, or as a printout. That turns "I think I usually take them" into a number you can actually discuss. And what about you — what do you anchor your morning tablet to, or is it also next to the coffee machine?
Frequently asked questions
How many people don't take their medication correctly?
The WHO estimated in 2003 that adherence for chronic conditions in high-income countries averages around 50 percent. A 2014 Cochrane review reached a similar conclusion: prescribed medications are typically taken for only about half of the prescribed doses.
What is the most common reason for not taking medication?
Forgetting. In a study of 261 people with high blood pressure, it topped the list at 39.5 percent, ahead of lack of time at 23.7 percent and travel at 19.7 percent.
Does a medication reminder via an app make a difference?
In a review of 16 studies, text message reminders roughly doubled the chance of taking medication as prescribed. However, the studies typically ran for only about twelve weeks, and adherence was often self-reported.
Can I just take a double dose if I forget a tablet?
Not without checking first. What to do when a dose is missed depends on the medication and is usually stated in the package leaflet. If in doubt, ask your pharmacist or doctor.
Is it a big deal if I forget for one day?
That depends on the medication, so ask your pharmacist. As for staying consistent: in a habit-formation study, missing a single day had little effect on whether the action eventually became automatic. Frequent gaps, however, did slow things down.
Who should I talk to if I want to stop taking a medication?
Talk to your doctor before making any changes. Concerns about side effects or doubts about the benefit belong exactly there. Often there is another solution — a different medication, a different time of day, or a simpler regimen.
That was the snapshot. The app turns it into daily support.
Measure every day instead of calculating once: Vito or Vita puts your numbers in context, builds you a weekly plan and speaks up when something stands out.
From November 2026 — first for iPhone, Android follows. Notify me when it launches ↓
Sources
- World Health Organization. Adherence to long-term therapies: evidence for action. Press release, 1 July 2003.
- Nieuwlaat R, Wilczynski N, Navarro T, et al. Interventions for enhancing medication adherence. Cochrane Database Syst Rev. 2014;(11):CD000011.
- Vrijens B, De Geest S, Hughes DA, et al. A new taxonomy for describing and defining adherence to medications. Br J Clin Pharmacol. 2012;73(5):691–705.
- Fischer MA, Stedman MR, Lii J, et al. Primary medication non-adherence: analysis of 195,930 electronic prescriptions. J Gen Intern Med. 2010;25(4):284–290.
- Vrijens B, Vincze G, Kristanto P, et al. Adherence to prescribed antihypertensive drug treatments: longitudinal study of electronically compiled dosing histories. BMJ. 2008;336(7653):1114–1117.
- Voils CI, King HA, Neelon B, et al. Characterizing weekly self-reported antihypertensive medication nonadherence across repeated occasions. Patient Prefer Adherence. 2014;8:643–650.
- Horne R, Chapman SC, Parham R, et al. Understanding patients' adherence-related beliefs about medicines prescribed for long-term conditions: a meta-analytic review of the Necessity-Concerns Framework. PLoS One. 2013;8(12):e80633.
- Simpson SH, Eurich DT, Majumdar SR, et al. A meta-analysis of the association between adherence to drug therapy and mortality. BMJ. 2006;333(7557):15.
- Claxton AJ, Cramer J, Pierce C. A systematic review of the associations between dose regimens and medication compliance. Clin Ther. 2001;23(8):1296–1310.
- Thakkar J, Kurup R, Laba TL, et al. Mobile Telephone Text Messaging for Medication Adherence in Chronic Disease: A Meta-analysis. JAMA Intern Med. 2016;176(3):340–349.
- Choudhry NK, Krumme AA, Ercole PM, et al. Effect of Reminder Devices on Medication Adherence: The REMIND Randomized Clinical Trial. JAMA Intern Med. 2017;177(5):624–631.
- Conn VS, Ruppar TM. Medication adherence outcomes of 771 intervention trials: Systematic review and meta-analysis. Prev Med. 2017;99:269–276.
- Lally P, van Jaarsveld CHM, Potts HWW, Wardle J. How are habits formed: Modelling habit formation in the real world. Eur J Soc Psychol. 2010;40(6):998–1009.
- British Psychological Society, Research Digest. How to form a habit.