Taking medicines as prescribed: why it matters and how to manage it

1. Introduction

Prescribed medicines only help if they are collected and taken as intended. Adherence is the word used for how closely a person follows the prescribed plan, including timing, amount, how often and for how long. The US Centers for Disease Control and Prevention (CDC) describes adherence as essential to better outcomes in long-term (chronic) disease and lower health care costs ^[1]. This article explains why people struggle and what can help. It is education only, and the doctor decides treatment.

2. How common is the problem

In its review of US data, the CDC reports that about 3.8 billion prescriptions are written in the United States each year, that about one in five new prescriptions is never filled, and that about half of filled prescriptions are taken incorrectly, often in timing, dose, frequency or duration ^[1]. Poor adherence is linked with more hospital admissions, poorer health outcomes, higher illness and death rates, and higher costs ^[1]. Figures come from the United States, but the reasons behind them are familiar everywhere.

3. Why people miss doses

The CDC groups the causes into three areas ^[1]:

• The person. Forgetting doses or refills and misunderstanding instructions, which gets worse with complex regimens. Other reasons include cost, beliefs about the illness, side effects, expecting no improvement, low mood, memory problems and little involvement in decisions.
• The care team. Poor communication, complicated dosing and weak coordination between several providers.
• The health system. Limited access to prescribers, restricted coverage, high co-payments, unclear labels and a lack of culturally suitable education.

Some people also stop because they feel better. The FDA advises against skipping doses or stopping a prescription without asking your provider, even when you feel better, and notes that medicines for conditions such as high blood pressure, high cholesterol and diabetes only work when taken consistently ^[2].

4. What helps

The CDC review describes several approaches that can help ^[1]:

• Organising medicines. Pillboxes and blister packs are a cost-effective way to reduce unintentional missed doses. Electronic reminders can also help.
• Team-based care. Patients who received team-based care, including pharmacist-led education and voice-message reminders, were more adherent 12 months after leaving hospital (89%) than those without it (74%).
• Lower costs. After one employer reduced or removed co-payments for certain medicines, adherence among people with diabetes or vascular disease rose by 3 to 4 percent compared with a similar group. The authors call this modest but potentially important if repeated widely.
• Technology. Electronic prescribing was linked with about a 10% rise in first-time filling compared with paper prescriptions. In one medical group, giving patients home blood pressure monitors and sharing the readings with their records was followed by a rise in blood pressure control from 68% to 79%.
• Simpler plans. The same group chose lower-cost medicines and reduced the complexity of regimens, for example with once-daily and combination pills.
• Tailored support. The authors call for approaches matched to each person's reasons. Low health literacy is more common in older adults, in racial and ethnic minorities and in people living in poverty, so materials should suit each person's reading level, culture and language.

The authors also note that few studies show that gains last over time, and that studies measure adherence in different ways, which makes them hard to compare ^[1]. Their overall advice is to ensure access to providers and use team-based care, educate and empower patients about their regimen, reduce barriers such as cost, and use health information technology to support decisions and communication ^[1].

5. Practical steps at home

• Ask a pharmacist for tools or suggestions if you struggle to remember your medicines ^[2].
• Take medicines with meals or at set times when the label says so, and use timers or reminder apps ^[3].
• Keep a list of all your medicines, vitamins and supplements, with the name, amount and timing, and show it to every provider ^{[2, 3]}.
• Read the label and ask if anything is unclear ^[3].
• Keep up with any blood tests your doctor recommends ^[3].
• Raise bothersome side effects early. Some, such as memory trouble, dizziness or sleepiness, can mimic other health problems, so ask whether a medicine could be the cause ^[2].
• Do not change a dose yourself, because doses are based on clinical testing ^[2]. Do not take medicine prescribed for someone else ^[2].

6. Special groups

Older adults often take more medicines, and ageing can change how the liver and kidneys handle them, so regular reviews matter ^[2]. For children, an adult should give medicines using the dosing device supplied and check active ingredients so the same one is not given twice ^[3].

7. When to see a doctor

Tell your doctor or pharmacist if you keep forgetting doses, cannot afford a medicine, dislike a side effect, or do not understand the instructions. Never stop a medicine suddenly on your own, and tell your doctor about every treatment you use, including traditional and herbal products.

In an emergency, call your local emergency number (112 in India, 911 in the United States). Seek urgent help if a missed or stopped medicine is followed by severe symptoms such as chest pain, trouble breathing, or confusion.

8. Conclusion

Taking medicines as prescribed matters for long-term health, yet it is common to miss doses for understandable reasons. Simple tools, pharmacist support, clear information and honest conversations with your care team can help.