Feeling a cold or an upset stomach while traveling in the US is rough — clinics are pricey and hard to book. Most minor symptoms can be handled at a drugstore (CVS, Walgreens, Walmart) without a prescription.
1. What it saves. Store-brand generics have identical active ingredients at about half the price — look for “Compare to Tylenol” on the box. And talking to the pharmacist is free.
2. Where the risk is. Duplicate ingredients — take a multi-symptom cold product that already contains a fever reducer, then add Tylenol on top, and that is an overdose. Read the ingredient lists against each other.
3. What to do. Shop by ingredient, not brand. Every US OTC product carries a “Drug Facts” panel with the active ingredient and dose at the top — unfamiliar branding does not matter as long as the ingredient matches.
Part 1 covers cold, pain, and digestive symptoms.
Three rules first
- Choose by ingredient — every US OTC has a “Drug Facts” label; the top Active Ingredient lists the substance and dose. Brand doesn't matter if the ingredient matches.
- Store brands are cheaper — CVS/Walgreens generics have the same ingredient at half the price (“Compare to Tylenol”).
- Avoid doubling ingredients — a combo cold medicine plus a separate Tylenol can overdose acetaminophen. Check the labels overlap.
Only one brand name appears in the agency list
A US drugstore aisle is intimidating because there are dozens of brands. The list an agency actually publishes looks nothing like that.
The nine over-the-counter items the US Centers for Disease Control and Prevention tells travelers to pack are: diarrhea medicine · antacid · antihistamine · motion sickness medicine · cough drops, suppressant or expectorant · decongestant · pain and fever medicine · mild laxative · mild sedative or sleep aid.
That is the whole trick of this article — shop by ingredient, not by brand.
The CDC itself writes the painkiller entry as “acetaminophen, aspirin, or ibuprofen” — ingredient names. US drugstores stock a store brand right next to the famous one, and same ingredient at the same strength is the same medicine.
Ignore the front of the box; read “Active Ingredients” on the back. Match the name and the mg and you are done.
Group the nine by symptom and digestion dominates — diarrhea, antacid, laxative, and motion sickness makes four (our count). But this is a travel list, so it does not mean these are the medicines Americans buy most.
Read the diarrhea entry carefully. The CDC writes that “several drugs, such as loperamide, can be bought over-the-counter to treat the symptoms of diarrhea” and that they “decrease the frequency and urgency of needing to use the bathroom, and may make it easier for you to ride on a bus or airplane while waiting for an antibiotic to take effect.” In other words, it manages the symptom; it is not the cure. The same page adds that “in serious cases… oral rehydration solution… can be used for fluid replacements,” and that “if severe diarrhea develops soon after you return from your trip, see a doctor and ask for stool tests.”
Pain and fever
| Ingredient | Brand | Notes |
|---|---|---|
| Acetaminophen | Tylenol | Gentle on stomach; avoid with alcohol/liver disease, don't exceed daily max |
| Ibuprofen | Advil, Motrin | Anti-inflammatory; watch stomach, kidney, BP; take with food |
| Naproxen | Aleve | Long-lasting; same NSAID cautions |
| Aspirin | Bayer | Not for children (Reye's); stomach bleeding risk |
Key. Acetaminophen (Tylenol) doesn't mix with alcohol; NSAIDs (ibuprofen, naproxen, aspirin) burden stomach and kidneys. Weak stomach → Tylenol; inflammation/muscle ache → ibuprofen. Watch for duplicate fever reducers in combo products.
Cold, congestion, cough, sore throat
| Symptom | Ingredient | Brand |
|---|---|---|
| Congestion (oral) | Pseudoephedrine | Sudafed (behind counter, ID needed) |
| Congestion (spray) | Oxymetazoline | Afrin (max 3 days) |
| Runny nose/sneezing | Antihistamine | Benadryl (drowsy) / see Part 2 |
| Mucus/cough (expectorant) | Guaifenesin | Mucinex, Robitussin |
| Dry cough (suppressant) | Dextromethorphan (DM) | Delsym, Robitussin DM |
| Sore throat | Benzocaine, etc. | Cepacol, Chloraseptic |
Worth knowing. The FDA has concluded oral phenylephrine (“Sudafed PE,” 'PE' products) doesn't work for congestion and is moving to remove it. For real relief, use pseudoephedrine (Sudafed, behind the counter with ID) or an Afrin spray. Sudafed: caution with high blood pressure, heart conditions, insomnia.
Digestive — heartburn, indigestion, diarrhea, constipation, nausea
| Symptom | Ingredient | Brand |
|---|---|---|
| Heartburn (fast) | Calcium carbonate (antacid) | Tums, Maalox |
| Heartburn (lasting) | Famotidine / Omeprazole | Pepcid / Prilosec OTC |
| Bloating/gas | Simethicone | Gas-X |
| Diarrhea | Loperamide | Imodium |
| Upset stomach/nausea | Bismuth subsalicylate | Pepto-Bismol (may darken tongue/stool) |
| Constipation | Polyethylene glycol | MiraLAX |
| Motion sickness/nausea | Dimenhydrinate/Meclizine | Dramamine, Bonine |
If traveler's diarrhea comes with high fever, bloody stool, or severe dehydration, don't just take anti-diarrheals — seek care (ER or clinic?). Replace fluids/electrolytes (Pedialyte) first.
Example: cold and body aches on the road
For runny nose + cough + mild fever + aches: ① aches/fever → Tylenol or Advil; ② congestion → Sudafed (counter) or Afrin (≤3 days); ③ chesty cough → Mucinex; ④ at night → NyQuil for sleep + relief. Don't combine ① with a combo medicine (duplicate fever reducer). With only one or two symptoms, single ingredients are safer than a combo.
Safety checklist
- ☐ Check for duplicate ingredients (combo + separate pain reliever = overdose risk)
- ☐ No Tylenol with alcohol; NSAIDs → stomach/kidney/BP caution
- ☐ Sudafed caution with hypertension/heart/insomnia (ID at counter)
- ☐ Afrin spray only up to 3 days
- ☐ Children, pregnancy, chronic illness, other meds → ask the pharmacist (free)
- ☐ Keep receipts for travel insurance
Questions that remain
Is “Tylenol” available in the US?
Yes — same Tylenol (acetaminophen). The store-brand “Acetaminophen” is cheaper and identical.
Why is the congestion medicine not on the shelf?
Pseudoephedrine (Sudafed) needs no prescription, yet it is not on the shelf. The basis is the Combat Methamphetamine Epidemic Act of 2005, effective 30 September 2006.
FDA lists the requirements as: ① “Placement of the product to ensure that customers do not have direct access to the product before the sale is made” — a secure pharmacy area or a locked cabinet customers cannot open; ② a photo identification card issued by the State or the Federal Government; ③ a logbook recording product name, quantity, purchaser name and address, and date and time; ④ a limit on quantity over a 30-day period.
So “behind the pharmacy counter or in a locked case” is more accurate than “behind the checkout” — the law fixes the outcome (no direct access), not the location. FDA does not print the quantity limit; it says to ask your pharmacist. No prescription is needed.
Can I buy antibiotics there?
No — oral antibiotics require a prescription. Drugstores sell OTC (non-prescription) only.
The key at a US drugstore is the Active Ingredient, not the brand. Know the ingredient and you'll buy the right thing — cheaply — even at an unfamiliar shelf.
Sources
- US CDC Travelers' Health — “Pack Smart” (checked July 2026). Source for the nine over-the-counter items, the painkiller entry written as “acetaminophen, aspirin, or ibuprofen,” and the fact that only the diarrhea entry names brands.
- US CDC Travelers' Health — “Travelers' Diarrhea” (checked July 2026). Source for what loperamide does, oral rehydration solution, stool tests after returning, and antibiotics only for severe cases, through a doctor.
- 21 CFR § 201.66 — format and content requirements for OTC drug labeling. Verified from a copy supplied by the site owner (the e-CFR as hosted by Cornell LII), not the government site. Source for the title “Drug Facts”, the rule that “Active ingredient(s)” must be followed by the established name and the quantity per dosage unit, the order Purpose → Uses → Warnings → Directions → Inactive ingredients → Questions?, and that inactive ingredients are listed alphabetically.
- US Food and Drug Administration — “The Over-the-Counter Drug Facts Label” (checked July 2026). Source for “the substance(s) in the product that cause the intended therapeutic effect… also states the amount… for each dosage unit” and “many OTC medicines may have similar brand names with different active ingredients. Make sure to read the label each time you use the product.”
- US Food and Drug Administration — legal requirements for pseudoephedrine (checked July 2026). Source for the Combat Methamphetamine Epidemic Act of 2005, its 30 September 2006 effective date, the no-direct-access placement rule, photo ID, the logbook and the 30-day limit.
- Our own calculation. The “8 by ingredient, 1 by brand” split and the symptom grouping (four digestive items) are our division of that list, not a classification printed in it.
Where to check further
- The dose and directions for the specific product you pick up. This article covers ingredients and categories only — the same ingredient comes in different strengths and forms. Read the Drug Facts panel on the box; that is the authoritative version.
- Purchase quantity limits on pseudoephedrine. The FDA page gives no number and says to ask the pharmacist — it varies by form and strength. The pharmacy counter answers this on the spot.
- Children, pregnancy and existing conditions. This article assumes an adult traveller, and the CDC list it draws on is for travellers, not a resident's medicine cabinet. If any of these apply, start with the free pharmacist consultation at the counter.
As of July 2026. The agency list and the diarrhea guidance come from CDC source text; the grouping is ours. This is general information and does not replace diagnosis or prescription. Follow the Drug Facts panel and your pharmacist. Allergy, skin, eye and sleep aisles are covered in part two; what to keep at home in the first-aid kit; when to stop self-treating in ER or clinic?; and who to call abroad in emergencies overseas.
