OTC Medicines and Supplements: The Basics
The drugstore aisle feels harmless because no prescription is needed, but over-the-counter products cause real harm in older adults: bleeding, falls, kidney and liver stress, and interactions with the medicines that do have prescriptions. This page is the quick safety pass for what the parent buys without a doctor.
treat every OTC product as a medicine
The OTC and supplement map
Over-the-counter medicines are real drugs with real risks, especially for older adults: kidneys and liver clear them more slowly, and common products interact with blood pressure, heart, and sedation medicines.
- The labelOne minute on the Drug Facts labelActive ingredient and dose (the same ingredient hides under many brand names, which is how double-dosing happens), uses and warnings, the "do not take with other medicines" interaction line, and the dosing-by-age rule, with the older-adult limit followed when listed.
- The trouble makersNSAIDs, diphenhydramine, decongestants, laxativesIbuprofen and naproxen: bleeding, kidney strain, and blood pressure effects, especially with blood thinners. Diphenhydramine (Benadryl and many sleep aids): sedation, confusion, and fall risk. Decongestants: raise blood pressure and heart rate. Daily laxatives: dependence and electrolyte problems.
- SupplementsNot regulated like drugsSupplements are not held to the same standards as medicines, so they get the same treatment: read what is in them, tell the pharmacist, and treat St. John's wort, high-dose vitamin K, and herbal products as medicines that interact.
- The ruleRun anything new past the pharmacistBefore any OTC product or supplement is added, the pharmacist checks it against the full list: the interaction map has the brown-bag method that makes the check complete.
The rule, in one sentence: treat every over-the-counter product and supplement as a medicine, read the Drug Facts label, and run anything new past the pharmacist.
Why OTC products deserve the same respect as prescriptions
Over-the-counter medicines are real drugs with real risks, especially for older adults: kidneys and liver clear them more slowly, and common products (ibuprofen, diphenhydramine, decongestants) interact with blood pressure, heart, and sedation medicines. The FDA's Drug Facts label exists precisely because these products need the same dosing and warning information as prescriptions. The family should read it the same way.
The label basics in one minute
- Active ingredient and dose: the same ingredient hides under many brand names, which is how double-dosing happens.
- Uses and warnings: the label lists who should not take it (including people with certain conditions) and when to stop.
- Do not take with other medicines: the interaction line, in plain language.
- Dosing by age: follow the older-adult limit if one is listed; when in doubt, ask.
The OTC products that cause the most trouble in older adults
- NSAIDs (ibuprofen, naproxen): bleeding, kidney strain, and blood pressure effects, especially combined with blood thinners.
- Diphenhydramine (Benadryl, and many sleep aids): sedation, confusion, and fall risk; the classic anticholinergic concern in older adults.
- Decongestants: can raise blood pressure and heart rate.
- Laxatives used daily: dependence and electrolyte problems; the doctor should be involved if the parent needs them regularly.
Supplements: not regulated like drugs
Supplements do not go through the FDA approval process that drugs do, so the family cannot assume a label claim is verified. That does not mean all supplements are useless; it means the family should apply a different standard: check the evidence with a clinician, watch for interactions, and be skeptical of miracle claims. The interaction guide covers why supplements count in the medicine list.
The pharmacist questions
- Is this safe with the parent's prescriptions?
- Is there a lower-risk alternative for the same problem?
- Is the dose right for their age, kidney, and liver?
- Is this supplement worth taking at all, based on their situation?
Related guides
- Medication interactions: what to watch
- The one-page medication list system
- Medicines that raise fall risk
Sources & verification
This page is checked against the standards in our editorial policy, preferring government sources for medication guidance. Reviewed August 2026:
- FDA: The OTC Drug Facts Label (retrieved August 2026)
- National Institute on Aging: Taking Medicines Safely as You Age (retrieved August 2026)
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