Sore Throat: Antibiotics or Not, When to Go In

Key takeaways

Most sore throats are caused by a VIRUS, and antibiotics do not kill viruses. Walking into a pharmacy for antibiotics to get better faster does nothing about the cause, while you still get the full set of side effects.
Strep throat is DIFFERENT — that one genuinely does need antibiotics. But nobody can tell reliably by looking into a throat, not even a clinician: it takes a throat swab.
Pointers towards strep: a sore throat that comes on suddenly, clearly painful to swallow, fever, and swollen tender neck glands — with NO cough, no runny nose and no hoarseness.
Why a doctor decides and not you: strep that is not treated properly can leave complications in the heart and kidneys, appearing after the throat has stopped hurting.
Difficulty breathing, unable to swallow even saliva, drooling, a muffled voice as if something is in the mouth, swelling on one side of the throat or in the neck, unable to open the mouth: go to emergency care — this is no longer an ordinary sore throat.
At home: drink enough, cool soft food, gargle with warm dilute salt water, rest the voice. No honey for babies under 1 year; no throat lozenges for small children because of the choking risk.

The most important thing first: most sore throats are caused by a VIRUS, and antibiotics do not kill viruses. So the thing people do most often — going to a pharmacy for antibiotics to get better faster — does not help. But there is one kind of sore throat that is quite different, and one set of signs that means emergency care right now.

Recognising it: leaning viral, or leaning strep

Every sore throat hurts, burns and makes swallowing hard — so the pain itself tells you nothing about the cause. What tells you more are the symptoms that come WITH it:

Leaning VIRAL	Leaning STREP
Cough, runny nose, hoarseness or red eyes present	Sore throat comes on SUDDENLY, clearly painful to swallow, no cough
Sore throat builds up gradually, along with the whole cold picture	Fever; glands at the front of the neck on both sides swollen and tender to press
Seen at every age	Tonsils red and swollen, with white spots or streaks of pus; commonest in children aged 5–15

According to CDC, cough, runny nose, hoarseness and red eyes are NOT symptoms of strep — if they are present it is almost certainly viral. The other direction is not reliable: CDC says plainly that strep cannot be diagnosed just by looking into the throat, not even by a clinician — it takes a throat swab.

Why strep has to be the doctor's decision

Group A strep is a bacterium, so this is the kind that genuinely DOES need antibiotics. According to CDC, taking antibiotics as prescribed helps you recover faster, reduces spread within the household, and most importantly prevents complications: strep that is not treated properly can lead to rheumatic heart disease — damage to the heart — and to kidney disease following the streptococcal infection.

And this is where self-treatment does the most harm: a course of antibiotics for strep has to be completed as prescribed. Taking them for a few days, feeling better and stopping means you have not prevented the complications, while you have already taken on the full set of side effects.

What to do at home

Drink steadily, a little at a time. Cool, soft things go down more easily: milk, yoghurt, thin rice porridge left to cool, ice cream, smoothies that are not acidic.
Gargle with warm, dilute salt water — for adults and children old enough to spit it out. Ready-made saline from a pharmacy is the easiest; mixing it too salty only makes the throat burn more.
Rest the voice: speak little, do not raise your voice, do not sing — one loud evening can add days of soreness.
Keep the air from getting too dry with a cool-mist humidifier; avoid cigarette smoke and air conditioning blowing straight at your face.
Honey soothes a raw throat and a cough, for adults and children from 1 year old. Do NOT give honey to a baby under 1 year.
Write down the DATE the sore throat started, whether there is fever, and whether there is a cough and runny nose — those three things decide whether a strep test is needed.
If you need something for fever or pain, ask a doctor or pharmacist. Paracetamol (acetaminophen) is a commonly used option, but the dose is theirs to decide.

What NOT to do

Do NOT buy antibiotics yourself: they kill bacteria, do nothing to viruses, and the side effects are there anyway — allergic rashes, nausea, diarrhoea, and more serious reactions.
Do NOT reuse a leftover course of antibiotics, somebody else's medicine, or a prescription photographed off the internet.
Do NOT treat antibiotics as harmless: according to CDC, taking them when they are not needed drives antibiotic resistance, so when you genuinely need them they work less well.
Do NOT swab, dab or paint unfamiliar remedies, traditional herbal preparations or plant material onto the tonsils — it easily causes ulceration and chemical burns to the lining, and hides what the doctor needs to see.
Do NOT give aspirin to children or teenagers who have a viral illness — according to CDC, aspirin in this group is linked to Reye's syndrome, a severe complication affecting the liver and brain.
Do NOT give throat lozenges to children under 4: choking risk. Numbing preparations in a small child's mouth are only for when a doctor has prescribed them.

When you must go to hospital

GO TO EMERGENCY CARE NOW, or call 115 (the emergency number in Vietnam), if ANY of the following is present — this is no longer an ordinary sore throat but a threatened airway: difficulty breathing, noisy breathing on the in-breath, or having to lean forward to breathe more easily; unable to swallow even saliva, drooling; a muffled voice as if something is in the mouth; marked swelling on one side of the throat, or swelling of the neck or under the jaw; unable to open the mouth; a stiff neck that will not bend; a very high fever with drowsiness, confusion or being hard to rouse; seizures. In small children, also: refusing to feed, unable to drink anything, a dry nappy for many hours, crying without tears. — BE SEEN SOON, within the next one to three days, rather than waiting for it to pass, if: the sore throat has lasted more than two days; the sore throat comes with fever and swollen tender neck glands but no cough and no runny nose — that is when a strep test is needed; a rash appears on the skin; antibiotics prescribed by a doctor have not helped or things are getting worse; the person has an underlying condition or a weakened immune system; sore throats keep coming back. — BE SEEN AGAIN even though the throat has stopped hurting, if after the episode there is: joint pain and swelling, or dark urine — CDC places these two signs in the group that must be seen, because they are late complications in the heart and kidneys.

When to call a doctor to the house

In these few days families usually want a clinician for two things: to look at the throat and the neck glands and say whether strep is a real possibility, and to order a test if one is needed. A Y Te Xanh (GreenCare) doctor or nurse can examine and take samples at your address; where a test has to be done at a facility, the doctor will say so clearly so you go to the right place. Calling the hotline to ask costs nothing; for the service itself we quote the price before we begin. But if any sign in the box above is present, go to hospital first and call afterwards.

The statements in this article about causes, strep testing, heart and kidney complications, the risks of antibiotics and the aspirin warning in children follow the public guidance of the US CDC; this article passes that on and does not replace being examined. Citing CDC here does not imply that CDC endorses Y Te Xanh or our services.

Need personalised advice for your loved one? Call our hotline 094 368 81 15 (24/7) — calling to ask a question or to book costs nothing. GreenCare has doctors who come to examine, nurses who carry out doctor's orders (injections, infusions, dressing changes), remote consultation by video call, and a review of the medicines you are taking; an in-depth remote consultation, or any one after the first, is a paid service. For children we take examination and acute care only — not long-term care at home, and not newborns or expectant mothers. We confirm we have staff in your area and provide transparent pricing before we begin.

Sources

CDC — Sore Throat Basics

Frequently asked questions

Which antibiotic should I take for a sore throat?

The question to answer first is whether this is the kind that needs antibiotics at all, because most sore throats are viral and antibiotics do nothing to a virus. Only strep throat needs them, and that is established by a throat swab, not by how much it hurts. Which medicine and how to take it is the doctor's decision after examining you — which is also why you should not reuse an old prescription or somebody else's leftovers.

How long does a sore throat take to get better?

A viral sore throat usually eases over a few days and clears by itself. But the number of days is not what to go by: according to CDC, a sore throat lasting more than two days is the point at which to be seen, particularly with fever and swollen tender neck glands but no cough and no runny nose. And if it eased and then became much worse, or if difficulty swallowing or difficulty breathing appears, be seen now rather than counting more days.

White spots or pus on the tonsils — does that mean it is serious?

White spots or streaks of pus on the tonsils are one of the pointers towards strep, so they are a good reason to get a test. But they do not mean “serious”, and they do not mean “definitely strep” either — some viruses produce a similar picture. More worrying than white spots is swallowing becoming so difficult that saliva will not go down, swelling on one side only, or being unable to open the mouth.

Is a sore throat contagious, and when can someone go back to school or work?

Both viral and strep sore throats spread through droplets when coughing and talking, and through shared cups, spoons and towels. For strep throat, CDC advises staying home until the fever has gone AND antibiotics have been taken as prescribed for at least half a day. For a viral sore throat the marker is the fever having gone and eating and drinking back to normal. While someone is ill, the whole household should wash hands and not share cups, spoons or towels.

Does gargling salt water really help, and how do you mix it?

According to CDC, gargling with warm salt water is one of the ways to ease symptoms at home. It does not treat the cause, so do not expect it to replace medicine or replace being seen. The easiest and safest option is ready-made saline from a pharmacy; if you mix your own, keep it weak and warm, because a salty mix only makes the throat burn more. Not for a child too young to spit it out, as they will swallow it.

If sore throats keep coming back, do the tonsils need removing?

That is a decision for the doctor after assessing how many episodes there have been, how much they affect eating, sleeping and schooling, and any complications already present — not a decision based on the feeling that it happens “too often”. The useful thing you can do before the appointment is to write the episodes down: roughly when each one was, whether there was fever, whether there was a test or antibiotics. That record changes the quality of the consultation completely.