Travelers' Diarrhea in Beijing: What to Buy, What to Eat, and When to See a Doctor

Food poisoning, or just your stomach adjusting?

Two patterns cover most cases. The adjustment type builds slowly over a day or two: loose stools, bloating, mild cramping, no real fever — usually from heavier oil, more chilli, iced drinks, or simply eating far more variety than at home. The food-poisoning type hits fast and hard, often 2–8 hours after one specific meal: sudden nausea, watery diarrhoea, cramps, sometimes a low fever. Both are usually self-limiting. What matters is not the label but the trajectory: if you can keep fluids down and things are easing by day two, you are inside the normal range.

Hour one: rehydration beats medication

The thing that actually puts travellers in hospital is dehydration, not the diarrhoea itself. Start oral rehydration salts immediately rather than waiting to see how bad it gets. A practical target is roughly 200–250 ml of fluid after every loose stool, sipped slowly rather than gulped, on top of your normal drinking. Plain water is not enough once you are losing electrolytes — you need the salts and a little sugar, which is exactly what ORS is. If you have no ORS yet, a bowl of salty noodle broth plus a banana is an acceptable stopgap for a few hours, not for a whole day.

What to buy at a Beijing pharmacy

Walk into any pharmacy (药店, marked with a green cross) and you will be handed something within a minute. Knowing the Chinese names gets you the right thing instead of whatever is on the counter. Prices below are the usual street ranges across major chains; the shelf tag is what you actually pay.

• Oral rehydration salts III — 口服补液盐散(Ⅲ) — The single most useful box. Typically one sachet dissolved in 250 ml of warm water; brands include 博叶. Roughly ¥10–35 for a box of 5–6 sachets, over the counter.
• Smectite powder — 蒙脱石散 — A clay-like powder that binds toxins and firms stools without paralysing the gut. Brand 思密达 is the common one; generics are cheaper. About ¥8–35 a box. Take it an hour or two away from other medicines, as it can reduce absorption — follow the package insert.
• Loperamide — 盐酸洛哌丁胺 (易蒙停) — Slows the gut and works fast — useful for a long metro ride or a flight you cannot miss. About ¥5–25 a box. Use it only when there is no fever and no blood: if the cause is an infection, stopping the diarrhoea traps it inside. Not for young children.
• Berberine — 盐酸小檗碱 / 黄连素 — A traditional mild gut antiseptic widely used in China for simple diarrhoea. About ¥6–20 a bottle. Gentle effect — reasonable for a mild case, not a substitute for a doctor if symptoms are strong.
• Probiotics — 益生菌 (整肠生 / 培菲康 / 妈咪爱) — Live bacterial preparations to help the gut recover after the episode. Roughly ¥18–80 depending on brand and pack size. Some strains need refrigeration, so check the box before buying it for a hotel room.
• Skip the antibiotics — 诺氟沙星 (norfloxacin) — Prescription-only in China and it genuinely needs a diagnosis. Do not pressure a pharmacy to sell it to you without a prescription; if you need one, see a doctor.

How to ask when nobody speaks English

Most Beijing pharmacists read Latin drug names far better than English sentences. A screenshot beats a conversation. There is a fuller version of this in our guide to seeing a doctor and buying medicine in Beijing.

• 拉肚子 (lā dùzi) — I have diarrhoea. Say it while pointing at your stomach — it is the phrase that starts everything.
• 有没有止泻药？(yǒu méiyǒu zhǐxiè yào?) — Do you have something for diarrhoea?
• 我要口服补液盐 (wǒ yào kǒufú bǔyè yán) — I want oral rehydration salts. Say it slowly — the pharmacist will recognise it immediately.
• Show, do not describe — A photo of the generic name (loperamide, smectite) or of your medicine at home works better than any spoken explanation.
• Bring your passport — You need it for the 发票 (official invoice) your travel insurer will ask for — a payment screenshot is not accepted.

Getting medicine delivered to your hotel

If you cannot face leaving the room, medicine delivery is one of the things China does extremely well. Dingdang (叮当快药) runs its own pharmacies around the clock in Beijing and advertises an average of about 28 minutes to the door in central areas; you can also reach it inside the Meituan (美团) app under 买药, or through JD's 买药秒送. The catch is that these apps are Chinese-only and want a local payment method. If yours will not go through, hand the phone — or a screenshot of the medicine name — to the hotel front desk and ask them to order for you. Orders are normally prepaid in the app, so settle payment before the rider is dispatched.

What to eat (and avoid) for the next 48 hours

Eat bland, warm and small. You do not need to fast — the old 'starve it out' advice is outdated and just leaves you weaker.

• Plain congee or steamed rice — 白粥 / 米饭 — The default recovery food. Every neighbourhood has a congee shop; plain 白粥 with a pinch of salt is exactly right for day one.
• Steamed buns and plain noodles — 馒头 / 清汤面 — Bland, warm, cheap and everywhere. Say 不要辣 (bú yào là, no chilli) if there is any doubt.
• Bananas — Replace potassium. Available in any convenience store for a few yuan.
• Avoid: dairy, iced drinks, alcohol — Cold drinks and milk are the two most common reasons day two goes backwards.
• Avoid: chilli, heavy oil and raw food — Hotpot, cumin skewers and cold salads can wait 48 hours. Your trip is longer than your appetite.

Two self-treatment mistakes worth avoiding

• Stopping the diarrhoea too early — Reaching for loperamide on day one while you have a fever can prolong an infection. Let mild cases run their course and treat the dehydration instead.
• Taking antibiotics just in case — Leftover antibiotics from home are a poor match for whatever you picked up here, and they are prescription-only in China. Get a diagnosis rather than guessing.
• Mixing every medicine at once — Smectite binds other drugs. Space your medicines one to two hours apart unless the insert says otherwise.

Red flags: when to see a doctor

Most cases never need a doctor. These do. Treat any one of the following as a reason to stop self-treating and go the same day.

• Blood or pus in the stool — Never self-treat this one. Go the same day.
• Fever above 38.5°C that will not come down — Especially if it comes with shaking chills.
• Signs of dehydration — Little or no urine for eight hours, dizziness when you stand up, very dry mouth, extreme thirst.
• Still getting worse after 48 hours — A mild case should be trending better by day two. Worsening is the signal.
• Severe or one-sided abdominal pain — Pain fixed in one spot, or pain that doubles you over, is not ordinary travellers' diarrhoea.
• You are pregnant, travelling with an infant, or over 70 — Lower your threshold considerably and seek advice early rather than waiting it out.

If you do need a doctor in Beijing

Go to a hospital emergency department (急诊), not a pharmacy. Beijing's public Grade-3A (三甲) hospitals are excellent and inexpensive but crowded, with Chinese-only reception; international clinics such as United Family (和睦家) have English-speaking staff and cost substantially more. Wherever you go, bring your passport, expect to pay a deposit upfront and settle the bill before you leave, and ask specifically for two documents: a 英文诊断证明 (diagnosis certificate in English) and a red-stamped 发票 (official invoice). Without those two, most travel insurers will not process a claim. If your policy requires pre-authorisation, call the insurer's 24-hour hotline before you go. For ambulance and emergency numbers, and hospital options near each KOULING hotel, see our full guide to doctors, pharmacies and emergencies in Beijing.