Best Practices for Choosing Safe OTC Medications at the Pharmacy

Every year, millions of people walk into a pharmacy looking for relief from a headache, a cold, or heartburn. They grab a bottle off the shelf, read the front label, and head out-often without ever checking what’s actually inside. That’s where things go wrong. Over-the-counter (OTC) medications might seem harmless because you don’t need a prescription, but they can still cause serious harm if used incorrectly. In fact, more than 198,000 single-substance OTC medication exposures were reported in 2022 alone, according to the American Association of Poison Control Centers. The good news? You can avoid most of these risks by learning how to choose OTC medications wisely. Here’s how.

Start with the Drug Facts Label

Every OTC product sold in the U.S. must have a standardized Drug Facts label. It’s not just a suggestion-it’s the law. Since 1999, the FDA has required this format to make it easier for consumers to compare products and understand what they’re taking. Look for this section on the back or side of the package. It’s organized the same way every time: active ingredients, purpose, uses, warnings, directions, and other information.

Don’t skip this. A 2022 study in the Journal of the American Pharmacists Association found that 34% of people misuse OTC meds because they don’t read the label. That’s not laziness-it’s a lack of awareness. The label tells you exactly what’s in the pill or liquid. If you’re taking two different products, you might accidentally double up on the same ingredient. For example, many cold medicines contain acetaminophen. If you take one for your fever and another for your cough, you could easily hit the maximum daily dose without realizing it.

Know Your Active Ingredients

Forget brand names like Tylenol, Advil, or Sudafed. What matters is the active ingredient. That’s the chemical that does the work. Here are the most common ones and what you need to know:

• Acetaminophen (Tylenol): Good for pain and fever. But it’s also the leading cause of accidental liver damage in the U.S. The FDA says more than 56,000 ER visits each year are due to acetaminophen overdose. Never take more than 3,000 mg in a day, and avoid alcohol while using it.
• Ibuprofen (Advil, Motrin): Helps with inflammation, swelling, and pain like muscle aches or menstrual cramps. Not safe if you have kidney disease, high blood pressure, or a history of stomach ulcers.
• Diphenhydramine (Benadryl): An antihistamine that can help with allergies or sleep. But it can make you drowsy for hours and is risky for older adults-it’s linked to confusion and falls.
• Pseudoephedrine (Sudafed): A decongestant. It works well, but it can raise blood pressure. If you have heart disease or an enlarged prostate, skip it.

Always check if you’re already taking a prescription drug that contains the same ingredient. For example, if you’re on a prescription painkiller with acetaminophen, adding Tylenol on top is dangerous. Talk to your pharmacist before combining anything.

Don’t Guess the Dose

Children aren’t just small adults. That’s why dosing for kids is based on weight, not age. The FDA warns that using household spoons to measure liquid medicine is a major cause of overdose. A teaspoon isn’t always 5 mL-it can vary by up to 200%. That’s why every OTC liquid medicine should come with a measuring cup or syringe. Use it. Don’t improvise.

And don’t assume “more is better.” Taking extra doses because you don’t feel better soon doesn’t help-it hurts. Most OTC pain relievers should not be taken for more than 10 days straight without seeing a doctor. If symptoms last longer, it’s not a medication problem-it’s a sign you need professional care.

Choose the Simplest Option

That 12-in-1 cold tablet? It’s usually a bad idea. The Ohio Department of Aging recommends picking medications that treat only the symptoms you actually have. If you have a runny nose and a cough, but no fever or body aches, you don’t need a product with acetaminophen, pseudoephedrine, and dextromethorphan all in one.

Each extra ingredient adds risk. More ingredients mean more chances for side effects, interactions, or accidental overdose. A 2023 review from the Merck Manual says self-diagnosis is the biggest gap in OTC safety. You might think you have a sinus infection, but what you really have is allergies. Taking a decongestant won’t help-and might make your blood pressure spike.

Use the Same Pharmacy

If you take multiple medications-prescription or OTC-stick with one pharmacy. Why? Because pharmacists can track what you’re taking. They can flag dangerous combinations before you even leave the store. A 2022 study in Research in Social and Administrative Pharmacy found pharmacist consultations reduced OTC medication errors by 67%.

Even if you’re just picking up ibuprofen, ask the pharmacist: “Is this okay with what I’m already taking?” They’re trained for this. And yes, it’s free. Most pharmacies offer this service as part of their role as health care providers, not just drug sellers.

Watch Out for Hidden Risks

Some conditions make certain OTC drugs risky:

• Diabetes: Decongestants can raise blood sugar. Talk to your doctor before using them.
• Heart disease: Antacids with sodium can increase fluid retention and worsen hypertension. Avoid them unless approved.
• Enlarged prostate: Antihistamines and decongestants can make it harder to urinate. They’re not safe for everyone.
• Pregnancy: Aspirin and NSAIDs like ibuprofen are not recommended during pregnancy, especially in the third trimester. Acetaminophen is usually okay, but still check with your provider.
• Older adults: One in two adverse drug reactions in the U.S. happens in people over 65. Why? Because metabolism slows down, and many take multiple meds. Even a small dose of diphenhydramine can cause confusion or falls.

If you’re over 65 or managing a chronic condition, don’t assume OTC means safe. Always ask.

When to Skip the Pharmacy Altogether

Some symptoms shouldn’t be treated with OTC meds. If you have:

• Chest pain or shortness of breath
• Severe headache with vision changes or confusion
• High fever that won’t break after 3 days
• Unexplained weight loss or night sweats

Don’t reach for Advil. Call your doctor. OTC meds are for minor, temporary issues. If something persists or gets worse, it’s not a medication problem-it’s a sign you need diagnosis.

What’s Changing in 2026?

The FDA is updating the OTC drug review process under the CARES Act of 2020. By 2025, new rules will make it faster to update safety labels and add new warnings. For example, in 2023, fluticasone furoate became the first OTC nasal steroid for allergies. That’s a big deal-it means more powerful options are becoming available without a prescription. But it also means labels are changing more often. That’s why reading the label every time matters more than ever.

Internationally, countries like India are moving toward formal OTC classifications for drugs like antifungals and laxatives. But in Australia, where regulations are stricter, many products that are OTC in the U.S. still require a pharmacist consultation. If you’re traveling, check local rules.

Bottom line: OTC doesn’t mean risk-free. It means you have the power to choose-but that power comes with responsibility. Read the label. Know the ingredients. Talk to the pharmacist. And if something doesn’t feel right, don’t push through it. Your health isn’t worth the gamble.