Most medication myths aren't silly. They sound reasonable, they're passed on by people you trust, and some of them used to be the official advice. That's what makes them stick.
This post takes six common beliefs and sets each against what reputable health bodies actually say. It's general information, not advice about your own medicines. If one of these touches something you take, the person to ask is your pharmacist or prescriber.
Myth 1: "I can stop the antibiotics once I feel better"
Feeling better is a sign the treatment is working, not proof the infection has gone. The CDC's advice is plain: take antibiotics exactly as prescribed, don't share them, and don't save them for later.
That last part matters. Stopping early often leaves a few tablets in the cupboard, and those end up being taken for the next sore throat, which may not need antibiotics at all. The CDC warns that taking leftover or someone else's antibiotics can delay the right treatment and cause side effects.
Some experts have questioned the "always finish the course" rule; a 2017 analysis in the BMJ argued that for many infections shorter courses may be enough. Course lengths are a question for prescribers, not patients. The practical rule for patients doesn't change: take it as prescribed, and if you want to stop early, ask first. Our guide to an antibiotic reminder app covers keeping a short course on track.
Myth 2: "If I miss a dose, I'll take two next time"
It feels like balancing the books. For most medicines it's the wrong move. The NHS says not to take a double dose to make up for a missed antibiotic dose, because taking doses too close together raises the risk of side effects. Its advice for atorvastatin, a common statin, is the same: skip the missed dose and take the next one at the usual time, and don't take two to make up.
What to do about a missed dose varies between medicines, which is why the answer is on the leaflet in the box. For some, you take it as soon as you remember unless the next one is nearly due; for others, you skip it. When in doubt, a pharmacist can tell you over the phone in a minute.
The better fix is fewer missed doses in the first place. Our post on why people miss medication doses goes through the causes.
Myth 3: "Generics are weaker than the brand"
A generic is a different box, often a different colour, and usually a lot cheaper. It's easy to assume cheaper means less effective.
The FDA says FDA-approved generic medicines work in the same way and provide the same clinical benefit and risks as their brand-name counterparts. It requires a generic to be the same as the brand in dosage, safety, effectiveness, strength, stability and quality, and in the way it's taken.
What can differ are inactive ingredients such as fillers and colourings, plus shape and colour. If a switch to a generic coincides with a change you've noticed, tell your pharmacist; an inactive ingredient can matter, for example if you have an allergy to it. But the premise that generics are a weaker version of the real thing isn't supported.
One practical tip: when the tablet in your box suddenly looks different, check the name on the label before assuming it's a mistake, and ask the pharmacist if you're unsure. Update your medication list if the name changed.
Myth 4: "Natural means safe"
Herbal products and supplements feel gentler because they come from plants or sit on the shelf next to the vitamins. The FDA's wording is direct: natural does not always mean safe.
Its examples are worth knowing. St John's wort can make a range of prescription medicines less effective, including some antidepressants, heart medicines, HIV medicines, transplant medicines and birth control pills. And combining warfarin, a prescription blood thinner, with ginkgo biloba, aspirin or vitamin E can increase the risk of bleeding.
The practical upshot: supplements belong on your medication list. Tell your pharmacist and doctor about everything you take, including teas, herbal remedies and vitamins. Doz does not check for interactions between medicines or supplements; that's a job for your pharmacist.
Myth 5: "If I feel fine, I don't need it"
This is the quiet myth, and probably the most costly one. Medicines for blood pressure and cholesterol often produce no feeling at all. The NHS notes that statins are usually taken long term to keep the risk of heart attack and stroke low, and advises talking to a doctor or pharmacist before stopping.
Feeling fine on these medicines is often the point. If you're wondering whether you still need one, that's a good question to raise at a medication review, where the answer can be based on your measurements rather than how you feel.
Myth 6: "It's not working, so I'll stop"
Some medicines take time. The NHS says antidepressants usually take 1 to 2 weeks to start having an effect and up to 8 weeks to work fully, and that you shouldn't stop one suddenly or without talking to your doctor. Medicines taken regularly also take time to build to a steady level in the body. Our guide on how long it takes for medication to work explains why.
If a medicine really isn't helping, or the side effects are too much, the prescriber needs to know. There may be a better dose, timing or alternative. Stopping quietly just removes the information they need to help.
Why these myths stick
Most of these beliefs share a pattern: they trust what you can feel over what you can't. You feel better, so the infection must be gone. You feel fine, so the medicine must be unnecessary. You feel nothing yet, so it must not work.
Medicines don't always follow that logic, and the gap is where a quick question to a pharmacist saves the most trouble.
Frequently Asked Questions
Should I finish antibiotics even if I feel better?
Take them exactly as prescribed, which is the CDC's advice. If you want to stop early, ask your prescriber or pharmacist first rather than deciding on your own, and don't keep leftovers for later.
Is it safe to take a double dose if I missed one?
For most medicines, no. The NHS advises against taking a double dose to make up for a missed one for antibiotics and for statins such as atorvastatin. Check the leaflet for your medicine, or ask a pharmacist.
Are generic medications as effective as brand names?
According to the FDA, approved generics work the same way and provide the same clinical benefit and risks as the brand-name medicine. Inactive ingredients, shape and colour can differ.
Can herbal supplements interact with prescription medications?
Yes. The FDA gives examples including St John's wort, which can make several types of prescription medicine less effective, and ginkgo biloba, which can add to bleeding risk alongside warfarin. Tell your pharmacist about every supplement you take.
Where to start
Put every supplement and herbal product you take onto your medication list today, next to the prescriptions, and take the list to your pharmacist at your next visit. If a missed dose is what keeps tempting you to double up, a reminder that sounds through Silent mode helps; Doz supports Critical Alerts for exactly that.
Sources
- CDC: Antibiotic use
- NHS: Antibiotics
- BMJ: The antibiotic course has had its day (2017)
- FDA: Generic drug facts
- FDA: Mixing medications and dietary supplements can endanger your health
- NHS: Antidepressants overview
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