Antibiotics: why the answer is sometimes no

Being told no is one of the most misunderstood moments in primary care.

It frequently reflects better medicine than the prescription you wanted.

What antibiotics do

• They act against bacteria.
• They do nothing against viruses.
• Different antibiotics act against different bacteria.
• The right choice depends on the likely organism and the site.
• This is why they are not interchangeable.

Conditions usually caused by viruses

• Common colds.
• Most sore throats.
• Most coughs in otherwise well people.
• Influenza.
• Most cases of acute bronchitis.
• Antibiotics do not shorten any of these.

Green phlegm is not proof of anything

• Colour comes from immune cells, not from bacteria specifically.
• It occurs in viral illness too.
• It is not a reason on its own for antibiotics.
• Duration, severity and other findings matter more.

What the clinician is weighing

• How likely a bacterial cause is.
• How unwell you are.
• Whether you have conditions that raise your risk.
• What harm the antibiotic itself could cause.
• Whether waiting is safe.

Antibiotics are not harmless

• Diarrhoea is common.
• Serious bowel infections can follow a course.
• Allergic reactions occur, occasionally severe.
• They interact with other medicines.
• They disturb the normal bacteria you depend on.
• A pointless course carries all of this risk and no benefit.

Resistance is personal, not only global

• Unnecessary courses select for resistant bacteria in your own body.
• Those bacteria persist for months.
• A later infection may then be harder to treat.
• This affects you, not only the population.
• It is the strongest personal argument for restraint.

Delayed prescriptions

• Sometimes you are given a prescription to use only if things worsen.
• Ask exactly what would justify starting it.
• Ask how long to wait.
• Ask what would mean returning instead.
• This approach reduces unnecessary use without leaving you stranded.

When antibiotics clearly are needed

• Certain confirmed bacterial infections.
• Some infections in people with weakened immunity.
• Serious illness where delay is dangerous.
• Before some surgical procedures.
• In these cases starting promptly matters greatly.

Taking them properly

• Follow the timing you were given.
• Ask whether food matters.
• Ask what to avoid, including alcohol where relevant.
• Ask what to do about a missed dose.
• Ask your pharmacist about interactions with everything else you take.

Duration

• Recommended lengths differ by infection.
• They have shortened for several conditions as evidence changed.
• Follow the instruction you were actually given.
• Do not extend a course because you still feel tired.
• Ask your prescriber rather than following general advice.

If you feel better after two days

• Do not stop on your own initiative.
• Ask whether the course can be shortened.
• Some can, some cannot.
• The answer depends on the infection.

If you are not improving

• Go back rather than waiting out the course.
• The organism may not be susceptible.
• The diagnosis may need revisiting.
• Ask what would indicate urgent review.
• Worsening despite treatment always deserves reassessment.

Never use leftovers

• They may be the wrong antibiotic for this infection.
• There is rarely a full course left.
• An incomplete supply is worse than none.
• Return unused medicines to a pharmacy.
• Do not share them with family members.

Buying without a prescription

• This is possible in some countries and is a major driver of resistance.
• Self-selected antibiotics are frequently the wrong choice.
• Quality outside the regulated supply chain is unreliable.
• Ask a pharmacist rather than choosing from a shelf.

Pressure on the prescriber

• Clinicians know patients often expect a prescription.
• Some prescribe to avoid a difficult conversation.
• Making clear you want the right answer, not a prescription, helps them.
• Say you would rather wait if waiting is safe.
• That sentence changes more consultations than any campaign.

Cultures and tests

• Sometimes a sample is taken to identify the organism.
• Results take time, so treatment may start before they arrive.
• Ask whether the treatment might change when results come back.
• Ask how you will be told.
• Chase results that do not arrive.

Probiotics and gut effects

• Antibiotic-related diarrhoea is common.
• Ask your pharmacist what is worth trying and what is not.
• Severe, bloody or prolonged diarrhoea needs urgent assessment.
• Do not treat that yourself with anti-diarrhoeal products.
• Mention any recent antibiotic course when you seek help.

Allergies

• Report any previous reaction clearly.
• Describe what actually happened.
• Rash, breathing difficulty and swelling are different from nausea.
• Many recorded allergies turn out to be intolerances.
• Ask whether yours could be formally reviewed, as it widens future options.

Antibiotics and other medicines

• Some antibiotics interact with common prescriptions.
• Some reduce the reliability of hormonal contraception in specific situations.
• Some interact with blood-thinning treatment.
• Some should not be taken close to certain supplements or dairy products.
• Ask your pharmacist to check your whole list before you start.

Antibiotics in children

• Most childhood respiratory infections are viral.
• Ask what specifically would indicate a bacterial cause.
• Ask what to watch for over the next days.
• Ask what would justify returning urgently.
• Never give a child medicine prescribed for someone else.

How to ask well

• Ask what the likely cause is.
• Ask what would change the answer.
• Ask what to expect over the next few days.
• Ask what would mean coming back.
• That conversation is more useful than a prescription.

The point to remember

Three things:

1. Unnecessary courses breed resistant bacteria in your own body.
2. Ask what would mean coming back rather than pressing for a prescription.
3. Never use leftover or shared antibiotics.

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