Chronic tonsillitis: drug therapy

In real-world clinical practice, chronic tonsillitis often presents as a mixture of two conditions: recurrent episodes of acute tonsillitis and persistent throat discomfort between episodes. Therefore, drug therapy should be tailored to the goal of treating the acute exacerbation and relieving symptoms, rather than prescribing long courses of medications without proven efficacy. [1]

Most sore throat episodes are viral in origin, and treatment is primarily symptomatic and observational. Antibiotics are not needed for everyone, but only if a bacterial cause is clinically probable or confirmed, particularly for infections caused by group A beta-hemolytic streptococci. [2]

A key practical error in chronic tonsillitis is attempting to treat chronic tonsillitis with continuous antibiotics or repeating antibiotics every time the infection flares up. This increases the risk of side effects and resistance, but does not prevent relapses. Clinical guidelines for patients with recurrent tonsillitis specifically emphasize that antibiotics have no proven role in preventing relapses. [3]

Another goal of drug therapy is to reduce the risk of complications from bacterial sore throat. For group A streptococcus, treatment is important not only for reducing symptoms but also for preventing purulent complications and other consequences, although the exact magnitude of the effect depends on the population and epidemiological situation. [4]

Table 1. Goals of drug therapy for chronic tonsillitis

Target	Which medications are most likely to actually help?	What usually doesn't work as a strategy
Relieve pain, fever, dehydration during an episode	paracetamol, ibuprofen, local anesthetics as indicated	long courses without a confirmed diagnosis
Eradicate group A streptococcus if confirmed	penicillin, amoxicillin, alternatives for allergies	antibiotics just in case if the likelihood of a bacterial cause is low
Reduce the risk of complications from bacterial tonsillitis	timely antibiotic therapy as indicated	prophylactic antibiotics between episodes
Reduce the frequency of episodes	more often it is resolved by observation and selection for surgery	long-term repeated courses of immunomodulators without a clear purpose

Sources for principles of choosing tactics. [5]

Antibiotics for acute illness: who, when, and why

Antibacterial therapy is primarily aimed at flare-ups that clinically resemble acute tonsillitis, rather than persistent throat discomfort. The practical algorithm begins with assessing the likelihood of a bacterial cause using clinical scales such as Centor, McIsaac, or FeverPAIN, and then, if in doubt, using a rapid test for group A streptococcus or culture. [6]

If the likelihood of bacterial tonsillitis is low, antibiotics are usually not necessary: the disease is often self-limited, and the benefit from antibiotics is minimal. NICE recommends a no-antibiotic or deferred prescription strategy for some patients, with clear guidelines for reassessment if worsening occurs. [7]

If group A streptococcus is confirmed or the clinical suspicion is high, penicillin or amoxicillin remain the drugs of choice. For many regimens, the standard treatment duration is 10 days, as the goal is reliable eradication of the pathogen. [8]

In cases of penicillin allergy, the choice depends on the type of reaction. Guidelines emphasize that in cases of immediate hypersensitivity, certain cephalosporins should be avoided, while macrolides and clindamycin are used based on local resistance patterns, which can vary significantly by region. [9]

Table 2. When antibiotics are most often justified during an exacerbation

Situation	Why an antibiotic is most likely needed	What is advisable to do before starting?
High clinical probability of bacterial tonsillitis according to the scale	higher probability of group A streptococcus	rapid test or culture, if this changes the decision
Positive rapid test for group A streptococcus	the pathogen has been confirmed	choose a drug and dose based on age and risks
Severe course and rapid increase in symptoms	increased risk of complications	assessment of complications and alternative diagnoses
History of complications, such as peritonsillar abscess	the higher the clinical significance of the episode	low threshold for in-person assessment

Sources for antibiotic prescribing strategy. [10]

Table 3. Approximate treatment regimens for streptococcal tonsillitis

Preparation	Dosage	Duration
Penicillin V orally	Adults: 500 mg 2 times a day; Children: 250 mg 2-3 times a day	10 days
Amoxicillin orally	50 mg/kg once daily (maximum 1000 mg) or 25 mg/kg twice daily	10 days
Benzathine benzylpenicillin intramuscularly	weight < 27 kg: 600,000 units 1 time; weight ≥ 27 kg: 1,200,000 units 1 time	1 dose
For allergies: cephalexin orally	20 mg/kg per dose 2 times daily (maximum 500 mg per dose)	10 days
For allergies: clindamycin orally	7 mg/kg per dose 3 times daily (maximum 300 mg per dose)	10 days
For allergies: azithromycin orally	12 mg/kg day 1, then 6 mg/kg per day days 2-5	5 days

Sources for dosage and stability. [11]

Symptomatic therapy during an episode

For any episode of sore throat, including viral and bacterial, the key remains controlling pain, fever, and dehydration. NICE specifically emphasizes self-care and symptomatic treatment as the mainstay of acute sore throat management, as most patients recover in about 7 days. [12]

To control pain and fever, paracetamol and ibuprofen are most often used in age-appropriate doses, taking into account contraindications. The practical goal is not simply to reduce fever, but to make swallowing tolerable so the person can drink and eat, reducing the risk of dehydration. [13]

Topical treatments can provide short-term relief: lozenges or sprays containing local anesthetics, anti-inflammatory components, or antiseptics. They should be considered as a complement to, not a replacement for, systemic therapy in cases of confirmed streptococcal tonsillitis. [14]

A single dose of a systemic corticosteroid, such as dexamethasone, may accelerate pain relief in acute sore throat, but the recommendation is usually weak and requires individual decision-making, particularly in people with diabetes, immunodeficiencies, and recurrent episodes. The effect is more often described as faster onset of relief rather than prevention of relapses. [15]

Table 4. Symptomatic remedies for exacerbation

Means	What does it give?	Important limitations
Paracetamol	pain relief, antipyretic	risk of overdose when combined with combination drugs
Ibuprofen	pain relief, inflammation reduction, antipyretic	use with caution in case of peptic ulcer, renal failure, dehydration
Local anesthetics and lozenges	short-term reduction in pain when swallowing	do not treat the cause, possible irritation of the mucous membrane
Rinsing and warm drinks	subjective relief, hydration assistance	do not replace antibiotics in case of confirmed streptococcus
Single corticosteroid	in some patients it accelerates pain regression	the solution is individual, not for frequent repetition without control

Sources for symptomatic management and steroids. [16]

Between flare-ups: preventive medications and approaches with limited evidence

Between episodes, the primary treatment strategy is usually not to continuously treat the tonsils with medications, but to reduce the incidence of true bacterial episodes and avoid overdiagnosis. For this purpose, the correct distinction between a sore throat and an episode of tonsillitis, along with the use of probability scales and tests as indicated, is crucial, as explicitly noted in a systematic review of guidelines for recurrent tonsillitis. [17]

Prophylactic antibiotics for preventing relapses of chronic or recurrent tonsillitis are not considered an evidence-based solution. ENT UK clearly states that there is no evidence supporting the role of antibiotics in preventing recurrent tonsillitis, and this is important to reflect in patient information to reduce the expectation of endless courses. [18]

So-called immunomodulators and bacterial lysates are actively promoted in a number of countries, and there are indeed studies on them in the context of preventing recurrent respiratory infections, as well as some studies on recurrent acute tonsillitis in children. However, this is not a universal standard for the management of chronic tonsillitis, and the evidence base is heterogeneous. Therefore, it is more appropriate to describe such agents as an option with limited applicability and only at the discretion of a physician. [19]

If a sore throat, cough, mucus in the back of the throat, or hoarseness persists between episodes, it's important not to treat it with antibiotics but to reconsider underlying causes, such as rhinitis, postnasal drip, or reflux. Otherwise, chronic discomfort is mistaken for a persistent flare-up of tonsillitis. [20]

Table 5. What is sometimes used between episodes and how to fairly evaluate the evidence

Approach	Where is it discussed?	What is known from the data	How to formulate correctly for the reader
Bacterial lysates, such as OM 85	prevention of recurrent respiratory infections, selected data on tonsillitis in children	There are individual studies and reviews, but no universal standard for chronic tonsillitis.	a possible option in certain cases, the decision is individual
Long courses of local antiseptics	often used empirically	evidence for relapse prevention is limited	may relieve symptoms, but has not been proven as a preventative
Preventive antibiotics	historically used	not recommended as a preventative measure for relapses	do not use unless specifically indicated
Regular single corticosteroid for each episode	sometimes practiced	is not a prevention strategy, but an episode-specific solution	consider only as a one-time treatment for severe pain

Sources for the position on antibiotics and bacterial lysates. [21]

Streptococcal carriage, frequent relapses and safety of regimens

With frequent positive tests for group A streptococcus, the carriage scenario is important: the bacteria are present in the pharynx, but an active immune response and typical clinical symptoms of a bacterial episode may not occur. The IDSA emphasizes that carriers typically do not require antimicrobial therapy, are poorly contagious, and have a very low risk of complications. [22]

However, there are rare situations when eradication of the carrier state may be beneficial: an outbreak of acute rheumatic fever or invasive streptococcal infection, an outbreak in a closed community, a personal or family history of rheumatic fever, significant anxiety in the family, or when tonsillectomy is being considered solely for the carrier state. These indications are formulated in the IDSA guidelines. [23]

In such cases, standard courses of penicillin or amoxicillin are often less effective at eradicating carriage than specialized regimens. IDSA lists regimens that are better at eliminating carriage, including clindamycin or combinations with rifampin, but these regimens require consideration of contraindications, drug interactions, and side effects. [24]

Safety is particularly important with repeated courses: clindamycin increases the risk of antibiotic-associated diarrhea, macrolides and clindamycin have regionally variable resistance, and rifampin has significant drug interactions. Therefore, it is useful to emphasize in educational materials that carrier eradication is not part of the routine treatment of chronic tonsillitis and is performed only under strict indications. [25]

Table 6. When to treat group A streptococcal carriage

Situation	Why is eradication considered?	Why is this rare?
Outbreak of acute rheumatic fever or invasive infection	reducing the risk of spread and complications	epidemiological confirmation is required
Outbreak in a closed group	transmission break	the decision is usually collective
History of rheumatic fever in the patient or family	minimizing potential risk	rare clinical scenarios
Considering tonsillectomy only due to carrier status	attempt to avoid surgery	First, a correct assessment of the episodes is needed

Sources on carriage and indications. [26]

Table 7. IDSA carrier eradication schemes

Scheme	Dosage	Duration
Clindamycin orally	20-30 mg/kg per day in 3 doses (maximum 300 mg per dose)	10 days
Penicillin V orally plus rifampin orally	penicillin V 50 mg/kg/day in 4 divided doses (maximum 2000 mg/day) plus rifampicin 20 mg/kg/day once daily for the last 4 days (maximum 600 mg/day)	10 days
Amoxicillin clavulanate orally	40 mg amoxicillin per kg per day in 3 doses (maximum 2000 mg amoxicillin per day)	10 days
Benzathine benzylpenicillin intramuscularly plus rifampicin orally	benzathine benzylpenicillin 1 dose by weight plus rifampicin 20 mg/kg per day in 2 doses (maximum 600 mg per day)	rifampicin 4 days

Source by modes. [27]

When drug therapy does not solve the problem

If exacerbations are frequent, clinically significant, and documented, the treatment strategy should include an honest discussion of the limits of conservative treatment. Guidelines for the management of recurrent tonsillitis typically focus on the number and severity of episodes, impact on quality of life, and the accuracy of the diagnosis, rather than on endlessly changing antibiotics. [28]

Classic criteria for consideration of tonsillectomy include 7 or more episodes in the last 12 months, or 5 or more episodes per year in the last 2 years, or 3 or more episodes per year in the last 3 years, provided they are clinically significant and adequately treated. Such thresholds are provided in NHS, EBI, and ENT UK documents.[29]

It's important to emphasize to patients that not every sore throat is tonsillitis. If episodes are actually related to viral pharyngitis, postnasal drip, or reflux, tonsillectomy will not produce the expected effect, and repeated antibiotics will only be harmful. This is a separate emphasis in surgical selection guidelines. [30]

Finally, there are situations that require urgent, non-routine intervention: peritonsillar abscess, severe difficulty breathing, inability to swallow fluids, signs of dehydration, rapid worsening of unilateral pain and trismus. In such cases, drug therapy should be prescribed after an in-person assessment and exclusion of complications. [31]

Table 8. Signs that it is time to reconsider the treatment strategy

Situation	What could this mean?	What is usually needed
Frequent documented episodes of high fever and exudate	recurrent acute tonsillitis	discussion of criteria for tonsillectomy
Repeated antibiotics without confirmation of streptococcus	overdiagnosis of a bacterial cause	implementation of scales and tests according to indications
Constant itching between episodes	concomitant rhinitis, numbness, reflux	revision of diagnosis and route
Episodes with trismus and unilateral edema	risk of abscess	urgent evaluation by an otolaryngologist

Sources by criteria and route. [32]