Feeling a cold or an upset stomach while traveling in the US is rough — clinics are pricey and hard to book. Luckily, most minor symptoms can be handled at a drugstore (CVS, Walgreens, Walmart) without a prescription. The catch: brand names differ completely from Korea, so you shop by active ingredient, not brand. 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.
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
FAQ
Is "Tylenol" available in the US?
Yes — same Tylenol (acetaminophen). The store-brand "Acetaminophen" is cheaper and identical.
Why is the congestion medicine behind the counter?
Effective pseudoephedrine (Sudafed) is kept behind the pharmacy counter and sold with ID (no prescription). Shelf 'PE' products are the ineffective ingredient — choose Sudafed.
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.
This is general health information, not medical advice. Follow label dosing; consult a pharmacist/doctor for children, pregnancy, chronic illness, or other meds. Persistent high fever, trouble breathing, severe pain, or dehydration need care (ER or clinic?). See also Part 2 (allergy, skin, eyes, sleep, motion sickness) and travel emergencies.
