Antibiotics for sore throat in children: indications and safety

In children, "tonsillitis" most often refers to acute tonsillopharyngitis—an inflammation of the tonsils and the back of the throat. It can be caused by viruses or bacteria. The most important bacteria pediatricians fear is group A streptococcus, as it is associated with the risk of rheumatic fever and some other complications. [1]

Most sore throats in children are caused by viruses, especially in preschool-aged children. Viral infections are typically accompanied by a runny nose, cough, conjunctivitis, and hoarseness. Antibiotics are ineffective in these cases, failing to shorten the duration of the illness and only increasing the risk of side effects and drug resistance. [2]

Streptococcal sore throat is more common in school-age children. It presents with sudden, severe pain in the throat, high fever, swollen and tender cervical lymph nodes, and sometimes the absence of a cough or runny nose. On examination, a bright, "flaming" throat, plaque on the tonsils, and possibly a small, pinpoint rash on the roof of the mouth are visible. However, it's impossible to reliably distinguish viral from bacterial sore throat based solely on the appearance of the throat. [3]

The most dangerous complications of streptococcal sore throat are divided into purulent and immune-related. Suppurative complications include peritonsillar abscess, otitis, sinusitis, and cervical abscesses. Immune-related complications include rheumatic fever and post-streptococcal glomerulonephritis. Current data show that proper use of antibiotics significantly reduces the risk of rheumatic fever and severe purulent complications, especially in regions with a high underlying risk. [4]

It's important to understand: antibiotics don't replace symptomatic treatment. Even with a confirmed streptococcal infection, the child needs antipyretics, adequate fluid intake, rest, and topical pain relief. Antibiotics only eliminate the bacteria, but they don't replace other care measures and don't work immediately: noticeable improvement usually occurs within 24-48 hours of starting proper therapy. [5]

Table 1. How viral sore throat differs from streptococcal sore throat in children

Sign	Viral tonsillitis	Streptococcal sore throat
Age	Most often children under 5 years old	Most often children from 5 to 15 years old
Onset of the disease	Gradual or against the background of ARVI	Sudden, sharp pain in the throat
Runny nose, cough	Often present	Usually absent
Temperature	It can be moderate	Often high, 38-39 and above
Plaques on the tonsils	Not always, often loose mucous membranes	Dense purulent plaque
The main causative agent	Respiratory viruses	Group A streptococcus

[6]

When does a child need antibiotics for a sore throat, and when not?

Current guidelines emphasize that antibiotics for sore throat in children are prescribed only when there is a high probability or confirmed streptococcal infection. These guidelines are based on clinical signs and test results, such as a rapid streptococcal antigen test or throat culture. In low-risk populations, treatment without confirmation is not recommended. [7]

In preschool-aged children, most sore throats are viral in nature, so routine testing and antibiotic prescription for every episode are unnecessary. Recommendations suggest assessing the severity of symptoms, the presence of a runny nose and cough, and the epidemiological background. In children over 3-5 years of age with a "streptococcal" set of symptoms (high fever, severe pain, no cough, purulent plaque), rapid testing or culture are more often indicated. [8]

In countries with a low risk of rheumatic fever, avoiding antibiotics in children with mild sore throats without signs of streptococcal infection does not lead to an increase in severe complications. This significantly reduces unnecessary use of antibacterial drugs. Large reviews have shown that antibiotics for viral sore throats offer little or no significant benefit in terms of complications, but they do increase the risk of side effects. [9]

However, for children in high-risk groups for rheumatic fever (eg, those living in unfavorable social conditions, overcrowding, or endemic regions), a more aggressive approach is used. In these cases, if there is a high probability of a streptococcal infection, the physician may initiate antibiotic therapy immediately after collecting a swab, without waiting for the results, or, if testing is not possible, based on the clinical picture. The goal is to reduce the risk of rheumatic complications, which is higher in these populations. [10]

Parents should remember a simple rule: the decision to prescribe an antibiotic for a sore throat should always be made by a doctor after examining the child. Do not start or continue antibiotics based on an old prescription, "just in case," or simply because "the throat is sore." This approach does not protect against complications and promotes the development of drug-resistant bacteria. [11]

Table 2. Typical situations and the need for antibiotics for sore throat in children

Situation	Do I need an antibiotic (in general)
Sore throat, runny nose, cough, mild fever	Most often no, it's more likely a viral infection
High temperature, severe pain, purulent plaque, no cough	A test is required, and if confirmed, an antibiotic is prescribed.
Large families, crowded conditions, high incidence of rheumatism	Antibiotics more often, based on test results or high clinical probability
Mild sore throat, the child generally feels well	Symptomatic therapy is often sufficient.
Self-initiated antibiotics "from a previous illness"	Incorrect tactics, requires revision by a doctor

[12]

Basic antibiotics for sore throat in children: first-line drugs

Almost all modern guidelines agree: the drugs of choice for confirmed streptococcal sore throat in children are penicillin V (phenoxymethylpenicillin) or amoxicillin. Group A streptococcus remains sensitive to these drugs, so there is no need for more powerful, broad-spectrum antibiotics. [13]

Phenoxymethylpenicillin has traditionally been considered the standard. In European and British guidelines, it remains the first choice for children, with a course of treatment lasting 5 to 10 days. Ten days provides more reliable bacterial eradication and preventative treatment for rheumatic fever. The dosage depends on age and body weight, and is determined individually by the physician. [14]

Amoxicillin is the preferred choice in many pediatric protocols. It is well absorbed, has a pleasant taste in suspension form, and has convenient once-daily or twice-daily dosing regimens. International and national recommendations suggest a dose of approximately 50 mg per kg of body weight per day, usually for 10 days, with a maximum daily dose of approximately 1000-1200 mg. [15]

For those with compliance issues or for children who have difficulty taking oral medications, intramuscular benzathine penicillin is an alternative. A single injection maintains therapeutic levels of the drug in the body for an extended period and is well suited for families with a high risk of missed pills. This injection should be administered by a healthcare professional in a setting where rapid treatment is available in the event of an allergic reaction. [16]

Broad-spectrum antibiotics, such as amoxicillin with clavulanic acid or second- and third-generation cephalosporins, are generally unnecessary for common strep throat in children. Their use is only justified in special situations, such as co-infections or documented failure of standard regimens. Routine use of such drugs leads to more side effects and increases the risk of bacterial resistance. [17]

All dosages and dosage forms should be selected by a physician, taking into account the child's age and body weight, any concomitant illnesses, the expected risk of complications, and the likelihood of treatment compliance. Substituting one penicillin for another or a more potent drug without a medical indication does not improve outcomes but increases risks. [18]

Table 3. First-line drugs for streptococcal sore throat in children

Preparation	Features of use in children	Role in treatment
Phenoxymethylpenicillin	The course is 5-10 days, with a 10-day priority for microbiological cure.	Classic drug of choice
Amoxicillin	Convenient in suspension, 1-2 doses per day, 10-day course	A very commonly used drug of choice
Benzathine penicillin	Single intramuscular injection	Alternative for poor adherence
Antipyretics and analgesics	Paracetamol, ibuprofen according to age	Not antibiotics, but a necessary part of treatment

[19]

Alternative antibiotics: penicillin allergy and special situations

In cases of true penicillin allergy, the approach depends on the nature of the reaction. If the reaction is not severe (without anaphylaxis, angioedema, or Stevens-Johnson syndrome), many guidelines allow the use of first-generation cephalosporins, such as cephalexin. They retain activity against group A streptococci and are well tolerated by children. [20]

In cases of immediate, severe allergic reactions to penicillin, cephalosporins are dangerous to use due to potential cross-sensitivity. In such cases, clindamycin or macrolides (azithromycin, clarithromycin) are considered as the primary alternatives, depending on regional resistance levels. Clindamycin has high activity against streptococci, but is more often associated with gastrointestinal side effects. [21]

Macrolides are convenient due to their short course of treatment and availability, but the problem is that resistance to this class of drugs by group A streptococci is widespread in many regions of the world. In some countries, the resistance rate exceeds 20-30%. This means that some children on macrolides will not benefit from treatment, even with perfect adherence. Therefore, choosing macrolides as a first alternative requires knowledge of the local epidemiological situation. [22]

In children with frequent sore throats, it is important to distinguish recurrent true streptococcal infections from viral pharyngitis and from streptococcal carriage. In carriage, the bacteria are found in the pharynx but do not cause significant clinical symptoms, while the child experiences repeated viral infections. Antibiotic treatment in this situation does not produce a lasting effect. Recommendations recommend caution when prescribing new courses and, if necessary, using more specific, well-studied regimens. [23]

A special group consists of children with high-risk factors for severe complications, such as a history of rheumatic fever or a family history of similar cases. For them, standard first-line medications remain the same, but the physician may have a different approach to the threshold for prescribing therapy and the choice of dosage form, often favoring regimens that ensure maximum reliability of course administration, such as benzathine penicillin. [24]

Table 4. Selecting an antibiotic for a child with penicillin allergy

Situation	Possible tactics (generally)
Mild rash in the past, no severe reactions	First-generation cephalosporin under the supervision of a physician
Anaphylaxis, severe allergic reactions	Clindamycin or macrolide, taking into account local resistance
High resistance to macrolides	Clindamycin is often preferred.
Frequent sore throats with negative tests	Look for other reasons, avoid unnecessary courses
A child who has had rheumatic fever	First-line drug plus emphasis on adherence

[25]

How to properly take antibiotics for a child with a sore throat

The standard course duration for streptococcal sore throat in children is 10 days. This applies to both phenoxymethylpenicillin and amoxicillin. This duration provides the maximum guarantee of eradication of the bacteria and prevention of rheumatic fever. Some guidelines allow for a 5-7-day course of phenoxymethylpenicillin, focusing on symptomatic relief, but for children, especially in regions with a risk of rheumatic disease, a 10-day treatment is traditionally maintained. [26]

Adherence to the prescribed dosage frequency is crucial. If the medication is prescribed twice daily, the intervals between doses should be approximately equal. Skipping doses or unintentionally reducing the frequency of doses reduces efficacy, increases the risk of incomplete bacterial eradication, and contributes to the development of resistance. If adherence is poor, regimens with a minimal number of doses are preferable, such as amoxicillin once daily or intramuscular benzathine penicillin. [27]

Even if a child noticeably improves after 2-3 days, the antibiotic should not be discontinued. Early improvement is due to the drug quickly reducing the bacterial load and inflammation, but some microbes may survive if the course is interrupted. This is one of the main causes of relapses and the reason why bacterial populations with partial resistance to the medications used develop. [28]

Follow-up tests after treatment in children with uncomplicated tonsillitis are not always necessary. However, they may be recommended in severe cases, during rheumatic fever outbreaks, if there is a history of rheumatic fever, or if symptoms persist after completion of treatment. If symptoms persist or return within weeks, a follow-up consultation and, possibly, a diagnosis clarification are required. [29]

Parents should discuss with their doctor in advance what to do if their child misses a dose, if vomiting occurs shortly after taking the medication, and how to combine the antibiotic with other medications (such as antipyretics). This "roadmap" reduces anxiety and helps avoid improvisations, which sometimes lead to unnecessary doses or, conversely, dangerous interruptions. [30]

Table 5. Basic rules for taking antibiotics for sore throat in a child

Rule	Why is this important?
Complete the full course	Prevention of relapses and rheumatic fever
Do not skip doses	Maintaining a stable concentration of the drug in the blood
Do not double the dose if you miss a dose.	Avoiding overdose and side effects
Do not change your medication without consulting a doctor.	Risk of bacterial inefficiency and resistance
Report any unusual symptoms	Timely detection of allergies and other adverse reactions

[31]

Side effects of antibiotics and common mistakes parents make

Like any medication, antibiotics can cause side effects. Penicillins and amoxicillin most often cause skin rashes, diarrhea, abdominal pain, and, less commonly, serious allergic reactions. Macrolides can cause nausea, abdominal pain, and sometimes heart rhythm disturbances in predisposed patients. Clindamycin is associated with an increased risk of diarrhea due to changes in the gut microbiota. [32]

Despite these risks, when prescribed correctly and monitored by a physician, the benefits of antibiotic therapy for strep throat in children far outweigh the potential harm. The incidence of serious allergic reactions is extremely low, and most side effects are limited to mild and reversible symptoms that can be managed with regimen modifications or supportive therapy. [33]

One of the most common mistakes parents make is starting antibiotics "from memory," relying on previous prescriptions or medications left over from home. This often leads to choosing the wrong medications, the wrong doses, and the wrong duration of treatment. As a result, the child bears all the risks but not guaranteed protection from complications, making it more difficult for the doctor to assess the true course of the disease. [34]

The opposite approach is no less harmful: categorically refusing antibiotics when a streptococcal infection is proven. In an attempt to "treat with folk remedies alone," parents leave their child unprotected from rheumatic fever and purulent complications. Modern data show that the benefits of antibiotics are clearly evident in the treatment of streptococcal sore throat, especially when therapy is initiated promptly. [35]

Mistakes also include arbitrarily shortening the course, sharing antibiotics between children in the family, taking two different regimens simultaneously "to be on the safe side," and ignoring doctor's recommendations for monitoring side effects. All of these actions increase the risk of bacterial resistance and worsen the prognosis not only for the individual child but also for those around them. [36]

Table 6. Typical mistakes in treating sore throat with antibiotics in children

Error	How might this end?
Self-medication with antibiotic "leftovers"	Incomplete treatment, bacterial resistance, risk of complications
Premature discontinuation of the drug	Relapse, persistence of streptococcus in the body
Refusal of treatment in case of proven streptococcus	Increased risk of rheumatism and purulent complications
Changing a drug without a doctor's advice	Loss of control over therapy, risk of incompatibility
Ignoring allergy symptoms	Possibility of severe reactions if continued use

[37]

A brief action plan for parents if they suspect a sore throat

If your child has a sore throat, fever, and difficulty swallowing, the first step should be to see a doctor. A pediatrician or pediatric otolaryngologist will examine the throat, assess the child's overall condition, and, if necessary, prescribe a rapid strep test or take a swab for culture. Before the visit, it's acceptable to administer age-appropriate fever-reducing medications, keep the child hydrated, and ensure the child rests. [38]

If strep throat is confirmed, the doctor will prescribe an antibiotic and explain the dosage, frequency, and duration of treatment in detail. It's important for parents to immediately clarify what to do if a dose is missed, what side effects are acceptable, and which require immediate medical attention or an ambulance. This reduces anxiety and promotes strict adherence to treatment. [39]

During illness, it is recommended to limit visits to children's groups to prevent spreading the infection. Typically, a child ceases to be contagious approximately 24 hours after starting appropriate antibiotic therapy, but the question of returning to daycare or school should be discussed with the attending physician, taking into account the child's overall well-being and any residual symptoms. [40]

After completing the course, evaluate the results: has the pain disappeared, has the temperature returned to normal, and are there any new complaints? If symptoms persist, the temperature rises again, or unusual signs appear (blood in the urine, joint pain, shortness of breath, severe weakness), consult a doctor immediately to rule out post-streptococcal complications. Early detection of such conditions significantly improves the prognosis. [41]

Table 7. "Roadmap" for parents when a child has a sore throat

Step	What to do
1. Suspect tonsillitis	Assess the sore throat, temperature, and general condition
2. Consult a doctor	Examination, if necessary, streptococcal test
3. Follow the treatment plan	If infection is confirmed, take a full course of antibiotics.
4. Protect others	Keep your child at home, maintain hygiene, and follow your doctor's advice.
5. Evaluate the result	If in doubt or if new symptoms occur, consult your doctor again.

[42]