Why Pill Check

Taking the medicine is only half of it. Taking it on time is the rest.

Most long-term medicines only work if they're taken consistently — the right dose, at roughly the right time, every day. Here's how often that doesn't happen, and why a single missed dose can matter more than it seems.

50%of doses, on average

Around half of patients on long-term medicines in higher-income countries don't take them as prescribed. In lower-resource settings it tends to be worse.1

The gap is wider than it feels

Non-adherence isn't one big decision to stop. It's small, ordinary slips — a script left at the pharmacy, a dose taken late, a busy week.

1 in 5

new prescriptions are never filled at all2

~50%

of the prescriptions that are filled get taken incorrectly — wrong timing, dose, frequency or duration2

63% vs 45%

kept to a twice-daily schedule versus three-times-a-day, when doses were electronically monitored — the more doses per day, the more get missed3

Timing is the quiet part

A dose taken late — or skipped and "caught up" later — isn't the same as a dose taken on time. Many medicines only protect while their level in the body stays in range, so a lapse can mean hours with little or no cover.8

That matters most for conditions with no symptoms to remind you. High blood pressure is the classic "silent killer": nothing feels wrong on a day a dose is missed, but the risk to the heart and brain is still there.6 For the highest-stakes medicines — like anti-rejection drugs after a transplant — even a few missed doses carry real risk.8

What missed doses add up to

125,000

preventable deaths a year in the US are linked to medicines not taken as prescribed4

up to 1 in 4

US hospital admissions are associated with nonadherence4

$528bn

a year — about 16% of US health spending — is lost to medicines not used as intended5

These are big, blunt numbers — but they start with one person, one box, one morning. Catching a missed dose early is where it turns around.

Closer to home

South Africa carries a heavy load of chronic illness, often several conditions at once. The same pill box, the same Tuesday-morning "did Mum take it?"

62% / 45%

of public-clinic chronic patients studied in Tshwane had hypertension and diabetes6

1 in 3

of those patients weren't taking their medicines as prescribed6

29%

of people with type-2 diabetes in a Cape Town chronic-medicine programme reached their blood-sugar target7

Where Pill Check comes in

One tap on the box after a dose logs the time — no app to open, nothing to charge. Family can see at a glance that today's dose was taken, and notice early on the days it wasn't. A quiet ring, not a red alert.

See how it works

Sources

  1. 1.World Health Organization, “Adherence to Long-Term Therapies: Evidence for Action,” 2003.
  2. 2.CDC Grand Rounds: Improving Medication Adherence for Chronic Disease Management, MMWR, 2017.
  3. 3.Ingersoll & Cohen, review of regimen factors in adherence (citing Paterson et al., 2000).
  4. 4.Duke Health / DiMatteo meta-analysis summaries on nonadherence, deaths and hospitalisation.
  5. 5.Watanabe, McInnis & Hirsch, “Cost of Prescription Drug-Related Morbidity and Mortality,” Annals of Pharmacotherapy, 2018 (includes nonadherence within non-optimised therapy).
  6. 6.Multimorbidity & adherence among PHC patients in Tshwane, South Africa, 2023.
  7. 7.Type-2 diabetes control in the Central Chronic Medicine Dispensing programme, Tshwane, 2021.
  8. 8.What should patients do if they miss a dose — systematic review of dosing forgiveness, 2021.

Figures are drawn from published research and public-health reporting. The US cost and death estimates are widely cited ranges, not exact counts; Pill Check is an adherence tracker and makes no clinical claims.