Management of Adult Pharyngitis

Diagnosis and Treatment

Only 5-15% of adult pharyngitis cases are actually caused by Group A Streptococcus, yet more than 60% of adults presenting with sore throat receive antibiotic prescriptions, representing massive overtreatment and inappropriate antibiotic use 1
The American College of Physicians recommends that antibiotics should only be prescribed for adults with confirmed streptococcal pharyngitis by positive rapid antigen detection test (RADT) or throat culture, as stated by the Infectious Diseases Society of America 1, 2
Antibiotics shorten symptom duration by only 1-2 days, with a number needed to treat of 6 after 3 days and 21 after 1 week, indicating a modest benefit at best 1
The primary justification for treatment is preventing complications, such as peritonsillar abscess, spread to close contacts, and acute rheumatic fever, although the risk of rheumatic fever is extremely low in adults 1
First-line treatment is penicillin or amoxicillin for 10 days to eradicate GAS from the pharynx and prevent acute rheumatic fever, as recommended by the American Heart Association 1

The Centor criteria can be used to assess the probability of GAS infection, but testing with RADT is recommended for adults with 2-3 criteria present, and treatment should only be initiated if the test is positive, as suggested by the American Academy of Family Physicians 1
Negative RADT does not require confirmatory throat culture in adults, due to the low prevalence of GAS and very low rheumatic fever risk, according to the Infectious Diseases Society of America 2

Every adult with pharyngitis should receive appropriate symptomatic care regardless of etiology, including NSAIDs or acetaminophen for pain and fever, throat lozenges, and salt water gargles, as recommended by the American College of Physicians 1
Reassurance that typical pharyngitis resolves in less than one week is also an important part of symptomatic management 1

The typical course of acute pharyngitis is less than 1 week, with most cases being self-limited viral infections that resolve without specific treatment 3, 4
Viral pharyngitis generally resolves in 7-10 days 5
Symptoms of viral pharyngitis may begin improving after 3-4 days 4
Bacterial pharyngitis (Group A Streptococcal) usually improves within 3-4 days without treatment 5
With antibiotic treatment, symptoms of bacterial pharyngitis typically shorten by 1-2 days 3, 4
The number needed to treat to reduce symptoms is 6 after 3 days of treatment and 21 after 1 week of treatment 3, 4

Streptococcal pharyngitis may have a longer duration than most viral causes if untreated 4
Appropriate analgesic therapy can reduce symptom duration and severity 6
Symptomatic treatment is the cornerstone of management for most cases, including NSAIDs or acetaminophen for pain and fever relief 3, 4
Throat lozenges, salt water gargles, and topical anesthetics may provide temporary relief 6
Antibiotics are only indicated for confirmed Group A streptococcal pharyngitis 3, 4
Patients should be informed that pharyngitis is typically self-limited 3
Antibiotics provide minimal benefit for symptom reduction in most cases 3, 4

Overuse of antibiotics for viral pharyngitis increases risk of side effects and antimicrobial resistance 3, 4
Inadequate pain management can prolong perceived duration of illness 6