Throat lozenges

Throat lozenges are dissolving tablets or lozenges that release slowly onto the lining of the oropharynx. Their primary purpose is to provide temporary, localized pain relief, reduce irritation, and improve swallowing comfort in patients with pharyngitis or tonsillitis. The effect is usually short-lived and symptomatic: lozenges do not address the underlying cause of the infection. [1]

Most popular lozenges work through a combination of mechanisms: demulcents create a protective film, antiseptics reduce the surface bacterial load, and local anesthetics and anti-inflammatory agents reduce pain. Many patients report improved well-being and sleep after use, but this effect is primarily subjective. [2]

Clinical guidelines and systematic reviews indicate limited long-term evidence for the benefits of over-the-counter lozenges: several reviews lack convincing evidence of a sustained therapeutic effect for simple respiratory infections. If bacterial sore throat is suspected, medical evaluation and testing are recommended. [3]

The practical value of lozenges is their immediate symptomatic relief: pain relief, ease of swallowing, and improved sleep. This is justified in adults and adolescents in the absence of any "red flags." For younger children, a more cautious approach is recommended due to safety concerns and the risk of side effects. [4]

What are lozenges made of and how do their main components work?

Demulcents and emollients. Sugar, glycerin, herbal syrups, and other demulcents form a thin protective film on the mucous membrane, reducing friction and irritation. This physical effect provides significant subjective benefit, especially for dry and scratchy throats. [5]

Antiseptics. Commonly used antiseptic compounds include 2,4-dichlorobenzyl alcohol, amylmetacresol, and chlorhexidine-like agents. They can reduce the superficial bacterial load on the mucosa, but do not replace systemic antibiotic therapy for deep or widespread bacterial infections. [6]

Local anesthetics and analgesics. Lidocaine, benzocaine, and phenols provide a rapid local anesthetic effect, reducing pain for 1-3 hours. However, some of these substances, such as benzocaine, are associated with rare but dangerous side effects, including methemoglobinemia, so their safety requires attention. [7]

Anti-inflammatory lozenges. Nonsteroidal anti-inflammatory lozenges containing flurbiprofen and topical nonsteroidal formulations (e.g., flurbiprofen 8.75 mg) have been shown in randomized trials to reduce pain and improve swallowing difficulty within the first 24 hours. Benzydamine lozenges have also been shown to be effective in a number of studies, particularly for rapid topical relief.[8]

What the clinical science confirms - a review of the evidence

Systematic reviews and guidelines. Large reviews indicate that for many over-the-counter sprays, solutions, and lozenges, there is limited high-quality data on long-term benefit. However, a number of specific formulas have shown short-term improvement in symptoms. The quality of the study and the specific active ingredient are crucial. [9]

Flurbiprofen. Several randomized trials and meta-analyses demonstrate that flurbiprofen 8.75 mg lozenges reduce the severity of sore throat and difficulty swallowing in the first 24 hours compared to placebo. This is one of the best-documented pharmacological effects of lozenges. [10]

Benzydamine. Topical benzydamine has shown clinically significant reductions in throat pain and inflammation in several trials and has gained support in dental and otolaryngology practice for short-term use. Recent publications and meta-analyses support its role in postoperative pain and acute pharyngitis. [11]

Demulcents and home remedies. There is evidence of benefit for honey and simple demulcents in reducing cough and improving sleep in children over 1 year of age. In some studies, home and non-drug approaches provide practical relief and are often less risky than aggressive pharmacological combinations. [12]

Safety, age restrictions and serious risks

Benzocaine and methemoglobinemia. Benzocaine-containing products can cause methemoglobinemia, a rare but potentially life-threatening condition, especially in infants and young children. Regulators in the US and Canada have recommended limiting or avoiding the use of benzocaine in children under 2 years of age and adding appropriate warnings. If symptoms of decreased blood oxygen saturation are suspected, seek immediate medical attention. [13]

Age restrictions. For many medicated lozenges, the minimum age is indicated on the packaging and ranges from 3 to 12 years, depending on the composition. Hard lozenges are generally not recommended for children under 4 years of age due to the risk of choking. Honey is contraindicated for children under 12 months. Consult a pediatrician before using it on a child. [14]

Allergic reactions and irritation. Components of the lozenges may cause contact allergic dermatitis, swelling of the mucous membranes, or increased coughing in sensitive individuals. If a rash, facial swelling, wheezing, or difficulty breathing occurs, stop using the lozenges immediately and consult a doctor. [15]

Interactions and systemic absorption. Most lozenges have minimal systemic absorption, but dosage forms containing nonsteroidal active ingredients and anesthetics require caution in patients with chronic diseases and when taking other medications. For pregnant and lactating women, the decision regarding use should be made by a physician, taking into account the benefits and risks. [16]

How to choose lozenges and how to use them safely

Choose based on your purpose. For rapid pain relief and discomfort reduction, choose lozenges containing benzydamine or flurbiprofen, unless there are contraindications and the patient's age allows. For gentle emollients and nighttime comfort, demulcents and honey are suitable for children over 1 year of age. [17]

Read ingredients and age labels. Before giving to a child or using lozenges on adults, carefully read the list of active ingredients and minimum age on the packaging. Avoid benzocaine in children under 2 years of age and limit use in children under 4 years of age for hard lozenges. [18]

Directions for use: Dissolve the lozenge slowly without chewing. Avoid consuming food and liquid immediately after dissolving to ensure optimal contact of the active ingredient with the mucous membrane. Follow the recommended dosage frequency and do not exceed the maximum daily dose stated in the instructions. [19]

When to see a doctor. If there is no improvement within 48 hours, a high fever, severe intoxication, difficulty breathing, increasing pain when swallowing, or signs of abscess formation develop, seek immediate medical attention. Lozenges are not a substitute for diagnosis and treatment of bacterial tonsillitis. [20]

Practical recommendations for different patient groups

Adults. For acute pain, choose lozenges with proven effectiveness for rapid relief; follow contraindications and avoid using benzocaine if you have symptoms of oxygen transport impairment. For chronic pain, consult a specialist to determine the cause. [21]

Adolescents and schoolchildren. Most formulations are suitable for adolescents; it is important to explain the safe dissolution technique and limit the combination of medications. For schoolchildren with recurring pain episodes, consultation with an ENT specialist is recommended. [22]

Children. Hard lozenges and hard candies are not recommended for children under 4 years of age due to mechanical safety concerns. If fever, difficulty breathing, or severe pain occurs, consult a pediatrician. For children over 1 year of age, if symptomatic treatment is needed, demulcents and honey are recommended, if appropriate. [23]

Pregnant and lactating women. Use only after consulting a doctor. Some active ingredients are not recommended due to insufficient data; if possible, choose formulations with minimal absorption and a limited course of use. [24]

Tables - quick reminders

Table 1. Common active ingredients in lozenges and their role

Component	Role	Comment
Demulgents (sugar, glycerin)	Soften the mucous membrane	Physical effect, low risk.[25]
2,4-Dichlorobenzyl alcohol + amylmetacresol	Local antiseptic	Reduction of surface bacterial load. [26]
Benzydamine	Anti-inflammatory, analgesic	Effective for fast pain relief.[27]
Flurbiprofen 8.75 mg	Nonsteroidal anti-inflammatory	Proven to reduce pain within the first 24 hours.[28]
Benzocaine, lidocaine	Local anesthetics	Rapid effect, risk of methemoglobinemia in children with benzocaine. [29]

Table 2. Which lozenges are suitable for whom and which are not

Group	Fits	Not recommended
Adults	Lozenges with benzydamine, flurbiprofen, demulgents	Dosage forms for contraindications
Teenagers	The same as for adults, taking into account age	Benzocaine in young adolescents at risk for methemoglobinemia
Children 1-3 years old	Demulgents, honey (only for children over 12 months, but not in the form of hard lozenges)	Hard lozenges, benzocaine
Children <12 months	No candy; no honey	Any hard lozenges and honey up to 12 months

Table 3. Evidence of effectiveness - overview by class

Class of drugs	Clinical trial data	Conclusion
Flurbiprofen 8.75 mg	Randomized trials have shown pain reduction.	Support for short-term use. [30]
Benzydamine	A number of clinical studies and reviews	Proven to reduce pain and inflammation locally.[31]
Antiseptics	Limited evidence on symptom reduction	May reduce surface bacterial growth.[32]
Honey and demulgents	Reviews show benefits for cough and comfort in children over 1 year old	A good non-drug option. [33]

Table 4. Safety - signs requiring immediate attention

Symptom	What to do
Paleness of the skin, cyanosis, shortness of breath	Call an ambulance immediately - methemoglobinemia is possible. [34]
Facial swelling, difficulty breathing	Stop use immediately and seek emergency medical attention. [35]
Increased pain, fever > 48 hours	See a doctor for evaluation and possible strep testing.[36]

Table 5. Brief instructions for the safe use of lozenges

Step	Recommendation
1	Read the ingredients and age restrictions on the packaging. [37]
2	Dissolve slowly, do not chew, do not give to children under 4 years of age. [38]
3	Do not use benzocaine in children under 2 years of age.[39]
4	If there is no improvement within 48 hours, consult a doctor. [40]

A Short Final Guide

1. Throat lozenges provide mainly short-term symptomatic relief: demulcents soften, benzydamine and flurbiprofen reduce pain, local anesthetics have a rapid effect but require caution. [41]
2. Benzocaine is associated with a rare but serious risk of methemoglobinemia; regulators recommend avoiding it in young children. Read the label carefully. [42]
3. For children under 4 years of age, lozenges are generally not recommended for mechanical safety reasons; honey is contraindicated for children under 12 months.[43]
4. If you have a high fever, severe intoxication, difficulty breathing, or no improvement within 48 hours, seek medical attention. Lozenges are not a substitute for diagnosis and systemic treatment for bacterial tonsillitis. [44]