How Do You Read the Drug Facts Label on Over-the-Counter Medicine?

To read the Drug Facts label on over-the-counter medicine, start with the active ingredients, then check the uses, warnings, and directions before you take a dose. Most labels follow the same order, so once you know the layout you can compare products quickly. The most important step is checking whether another medicine you take contains the same active ingredient. This article walks through the Drug Facts sections in order: active ingredients, uses, warnings, directions, other information, and inactive ingredients. It also explains when to ask a pharmacist first.

How to read the Drug Facts label, section by section

Federal labeling rules require most nonprescription medicines sold in the US to carry a standardized panel titled "Drug Facts." The format is meant to let people find the same information in the same place on every product. The headings usually appear in a consistent order, which lets you scan instead of reading every word.

MedlinePlus, from the National Library of Medicine, explains that over-the-counter medicines are those you can buy without a prescription, and that they still carry real risks if used incorrectly. See MedlinePlus: Over-the-Counter Medicines for a general overview.

Read the label every time you buy a product, even one you have used before. Manufacturers can change formulas, and two products with similar names on the same shelf may contain different ingredients.

Active ingredients: the first thing to check

The top of the panel lists the active ingredient and the amount in each tablet, capsule, or measured liquid dose. The active ingredient is the component that produces the medicine's effect. The purpose is listed beside it, such as "pain reliever/fever reducer" or "antihistamine."

This section matters most for avoiding double dosing. Many multi-symptom cold and flu products contain acetaminophen, and so do many pain relievers and sleep aids. Taking two products with the same active ingredient can push you past the daily maximum on the label, a recognized route to accidental acetaminophen overdose. The 24-hour maximum differs by product and by age. Add up the milligrams of acetaminophen per dose across every product you use and compare the total with the limit printed on the label. People who drink alcohol regularly or have liver disease should ask a pharmacist about limits. For more on acetaminophen specifically, see our article on whether taking Tylenol every day can damage your liver.

Brand names are not a reliable guide. A product with "Nighttime" or "Max Strength" in its name may contain several active ingredients. Check the list rather than relying on the name on the front.

• Write down the active ingredients of anything you take regularly, including prescription medicine.
• Compare that list against any new product before you use it.
• If the same ingredient appears twice, use only one of the products unless a clinician advises otherwise.

Active ingredients with common label warnings: acetaminophen, NSAIDs, decongestants, antihistamines

A few active ingredients appear in many products and carry warnings that are easy to miss when you combine products.

• Acetaminophen is a common duplicate ingredient in cold and flu, pain, and sleep products. The label states a maximum amount for 24 hours, and that limit applies across every product you use. Going over the label's 24-hour limit can injure the liver, sometimes without early symptoms, so count the acetaminophen in each product and ask a pharmacist if you are unsure of your limit. A large or intentional overdose needs emergency care even if the person feels well.
• NSAIDs such as ibuprofen, naproxen, and aspirin carry label warnings about stomach bleeding, kidney problems, and heart attack and stroke risk. Aspirin labels also warn about Reye's syndrome in children and teens recovering from a viral illness. These warnings are especially relevant for older adults, people with kidney or heart disease, and people who take blood thinners.
• Decongestants can raise blood pressure and heart rate. The label may advise asking a doctor first if you have high blood pressure or heart disease.
• Sedating antihistamines such as diphenhydramine, found in many "PM" products, can cause marked drowsiness and confusion, particularly in children and older adults. Labels for these products generally advise against use in young children and advise asking a doctor for older children, and they should not be used to make a child sleepy.

If you may have taken more than the label allows of any of these, call Poison Control at 1-800-222-1222 right away, even if you feel well, because some overdoses, including acetaminophen, can cause harm before symptoms appear. Yellowing of the skin or eyes, dark urine, black stools, vomiting blood, or ringing in the ears after taking a medicine can be signs of liver injury, bleeding, or salicylate toxicity and need urgent evaluation rather than waiting. Vomiting blood or coffee-ground vomit needs 911. If you take aspirin that a clinician prescribed, ask the prescriber before stopping it.

Uses: matching the product to your symptoms

The "Uses" section lists the symptoms the product is meant to relieve. A multi-symptom product treats several symptoms at once, so you may take ingredients you do not need. A single-ingredient product aimed at the one symptom you have can reduce the number of medicines your body has to handle.

If your symptoms are not listed under Uses, the product may not be appropriate for them. Symptoms that do not improve are also a reason to speak with a clinician rather than switch products.

Warnings: the section people skip most

The Warnings section is often the longest and is divided into labeled parts. Reading these parts can tell you whether the product is suitable for you.

"Do not use if" and "Ask a doctor before use if"

"Do not use" lists situations in which the product is generally not appropriate, such as an allergy to the ingredient or use with certain other medicines. "Ask a doctor before use if" lists conditions where the product may be risky, and the exact conditions vary by ingredient. Examples that appear on some labels include high blood pressure, heart disease, kidney disease, liver disease, glaucoma, an enlarged prostate, and asthma.

"Ask a doctor or pharmacist before use if you are"

This part often covers other medicines that may interact with the product. If you take prescription medicine, blood thinners, antidepressants, or herbal supplements, tell your pharmacist what you take so they can decide whether the combination is appropriate.

"When using this product" and "Stop use and ask a doctor if"

"When using this product" describes effects you may notice, such as drowsiness, and what to avoid, such as alcohol or driving. "Stop use and ask a doctor if" lists signs that the medicine may not be working or may be causing a problem, such as symptoms that last longer than the label says, a new rash, or ringing in the ears.

Pregnancy and breastfeeding

Many labels say to ask a health professional before use if you are pregnant or breastfeeding. Labels for NSAIDs such as ibuprofen and naproxen carry a pregnancy warning that these medicines can cause kidney problems in the unborn baby from about 20 weeks of pregnancy, which can lead to low amniotic fluid, so read that part of the label closely. Ask your obstetric clinician or pharmacist before using any nonprescription medicine during pregnancy. MedlinePlus has general information on pregnancy.

Keep out of reach of children

Nearly every label includes this line, and it can be the most important one in a home with young children. The label also tells you to seek medical help or contact Poison Control right away in case of overdose. Poison Control, 1-800-222-1222, is free and open 24 hours. For what to do after a child swallows a medicine, see our article on a child who swallows a battery, magnet, or medicine.

Directions: dose, age, and how often

Directions state how much to take, how often, and for whom. Many labels are organized by age group. A product made for adults is not automatically safe at a smaller amount for a child. Some labels say "ask a doctor" for a young age group, and that line means the manufacturer has not provided a dose for that age.

Do not work out a child's dose yourself from an adult label. Use the amount on the product made for children and the directions on that label, and ask your pediatrician or pharmacist if the label does not cover your child's age. For cough and cold products in young children, see our article on whether over-the-counter cough and cold medicine is safe for young children.

Measuring liquid medicine

Research on pediatric acetaminophen and ibuprofen suspensions has examined how well labels and dosing tools support correct use, and it found that label design and dosing devices can affect how easily caregivers follow directions (PubMed Central: pediatric oral suspension labeling). Practical habits can help.

• Use the cup, syringe, or spoon that came with the product, not a kitchen spoon.
• Check that the units on the tool (mL, teaspoon, tablespoon) match the units in the directions.
• Keep the dosing tool with the matching product, since different products can use different concentrations.

The Medication Errors page on MedlinePlus describes how mix-ups with dose and units can cause harm.

Inactive ingredients, other information, and the expiration date

"Inactive ingredients" are the dyes, flavors, binders, and sweeteners. They matter if you have a known allergy or sensitivity. "Other information" typically covers storage, such as keeping the product at room temperature, and may mention sodium content or tamper-evident packaging.

Check the expiration date and the packaging, and ask a pharmacist or a drug take-back program how to dispose of expired or damaged products. Do not use a product whose seal is broken or whose tablets look discolored or crumbly.

A "Questions or comments?" line gives a phone number for the manufacturer, and your pharmacist can also answer questions at no charge.

Generic and store-brand products

Store brands often carry the same Drug Facts format and the same active ingredient and strength as a name brand. Compare the active ingredients panel rather than the box design. Our article on whether generic drugs are really the same as brand-name medicines covers that question in more detail.

Reading the label when you take other medicines or supplements

Drug Facts labels apply to medicines. Dietary supplements use a separate "Supplement Facts" panel under different labeling rules, and the safety information on them can vary between products. Tell your pharmacist about supplements, because some can interact with prescription medicines.

If you are comparing pain relievers, our article on ibuprofen versus acetaminophen explains how the ingredients differ, and the label tells you which one you are holding.

Making labels easier to read

Small print is a real barrier. Research with older adults has tested redesigned over-the-counter labels to see whether they help people notice critical safety information (PubMed Central: change detection and OTC labels among older adults). Until labels improve, these steps can help:

• Use a magnifier or take a photo of the label and enlarge it on your phone.
• Ask the pharmacist to go over the warnings with you at the counter.
• Keep an up-to-date written list of your medicines to show any clinician or pharmacist.

MedlinePlus also has a page on health literacy if you want help understanding health information.

When a pharmacist or clinician should look at the label with you

A pharmacist can be a useful first stop. Consider asking if you take several medicines, have kidney, liver, or heart disease, are pregnant, are older, or are choosing a product for a young child. Tell them about everything you take so they can decide whether a product is appropriate. Do not change the dose or timing of a prescription medicine on your own because of something on an over-the-counter label; ask the prescriber.

When to Seek Medical Care