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Benzolac Cl

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Benzolac Cl

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Treatment option: Zits, Acne Vulgaris

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

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Overview of Benzolac Cl

Benzolac Cl is a prescription-only, fixed-dose combination topical medication intended for dermatological application on the skin. It is primarily classified as a Topical Acne Agent, designed to combine two active substances to address the complex factors contributing to Acne Vulgaris. Its identity is defined by its dual composition and its specific topical route of administration.

Quick Facts Description
Active Ingredient Benzoyl Peroxide, Clindamycin Phosphate
Form Aqueous Gel Formulation
Pharmacological Class Topical Acne Agent (Antibiotic/Oxidizing Combination)
Common Purpose Management of Acne Vulgaris
Origin Synthetic Compound Combination

What is the Medicinal Composition of Benzolac Cl?

Benzolac Cl is composed of two primary active ingredients: the lincosamide antibiotic Clindamycin Phosphate and the powerful oxidizing agent Benzoyl Peroxide. This medicinal entity is prepared as an aqueous gel formulation optimized for direct application to the skin. The combination of these two agents is recognized for the management of acne, and the product's general purpose is established in dermatological practice.

Classification: What Type of Topical Acne Agent is Benzolac Cl?

Benzolac Cl belongs to the pharmacological class of Topical Acne Agents that utilize a multi-modal approach. It represents a specialized treatment category that combines the action of an antibiotic with that of a rapidly acting surface agent, unlike monotherapy treatments. This dual classification means the product targets both microbial proliferation and physical follicular obstruction. This combination is used for managing mild to moderate inflammatory lesions, particularly in young adults and adolescents (12 years of age and older), to address different aspects of acne simultaneously.

The Functional Benefit of the Combination

The main functional benefit of the fixed combination lies in the synergistic action of its components. The inclusion of the potent Benzoyl Peroxide is designed to rapidly kill bacteria, which, in turn, helps to minimize the development of bacterial resistance to the Clindamycin antibiotic over the course of treatment. This co-formulation represents a dermatological strategy aimed at maximizing therapeutic outcomes and sustaining the effectiveness of the antimicrobial treatment.

Regulatory References

  1. National Institutes of Health (NIH) MedlinePlus
  2. American Academy of Dermatology (AAD) Acne Management Guidelines
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What side effects are possible with Benzolac Cl?

Possible Side Effects and Safety Information

The safety profile for this fixed-dose combination topical medication is derived from official regulatory documentation and post-marketing surveillance. The profile is primarily characterized by common dermatological application site reactions and a serious systemic risk associated with the clindamycin component.


Frequency-Classified Adverse Reactions

The majority of adverse events are localized and transient. Regulatory bodies classify reactions by frequency, with the most commonly observed effects involving the skin:

Frequency Adverse Reactions (Skin and General Disorders)
Common Dry skin (xerosis), peeling (desquamation), erythema (redness), and burning sensation at the application site.
Uncommon Contact dermatitis, pruritus (itching), rash, and pain at the application site.
Frequency Not Known Urticaria (hives), and severe allergic reactions (e.g., anaphylaxis).

Systemic Risk and Contraindications

Although absorbed systemically in minimal amounts, the clindamycin component carries a serious regulatory warning regarding the potential for Antibiotic-Associated Colitis (including Pseudomembranous Colitis). This risk is a primary safety constraint.

The product is officially contraindicated in patients with a history of certain gastrointestinal disorders, including regional enteritis, ulcerative colitis, or any prior antibiotic-associated colitis.


Safety Patterns and Special Populations

Official labels note a time-related safety pattern: the local cutaneous reactions, such as erythema and peeling, are often more pronounced during the initial weeks of treatment but generally subside with continued use. The safety and effectiveness of this combination are established for patients 12 years of age and older. Due to the Benzoyl Peroxide component, the product may cause increased sensitivity to sunlight, necessitating official caution against prolonged sun exposure.

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Overdose and Emergency Response

Overdose and When to Seek Help

Overdose for topical Benzolac Cl (Benzoyl Peroxide) products primarily relates to the risk of severe reactions or, in specific products, chronic exposure to a contaminant. While the product has a wide margin of safety, certain situations require urgent medical attention.

Acute Emergency Situations (Seek Immediate Medical Help)

Stop using the product and get emergency medical help immediately if you experience signs of a rare but serious hypersensitivity reaction, as described by the FDA. These symptoms may occur within minutes to a day after use and include:

  • Throat tightness or difficulty breathing
  • Swelling of the eyes, face, lips, or tongue
  • Feeling faint or severe dizziness
  • Widespread hives or itching of the face or body

Product Contamination Risk (Long-Term)

Government regulatory bodies, such as the FDA, have noted that certain Benzolac Cl products may be contaminated with benzene, a known human carcinogen, at levels exceeding safety thresholds, particularly when stored improperly or past the expiration date. Chronic, long-term exposure to high levels of benzene can decrease blood cell formation and may increase the risk of cancers like leukemia and other blood disorders.

Consumers should check for product recalls and are generally advised to dispose of products that have passed their expiration date. For concerns regarding long-term exposure or adverse events, patients and healthcare professionals are encouraged to report to regulatory adverse event monitoring programs.

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Therapeutic Uses of Benzolac Cl

Main Uses and Therapeutic Benefits

Benzolac Cl is a topical medication whose active ingredients, clindamycin and benzoyl peroxide, are generally applied in addressing acne vulgaris. This combination formulation is relevant in conditions characterized by periods of heightened symptoms, specifically mild to moderately severe inflammatory acne. This is commonly used across conditions presenting with acute episodes.

This topical therapy is indicated for the treatment of acne vulgaris. It helps address symptom clusters that may become intense or disruptive, such as papules, pustules, and associated inflammation. The formulation is applied in clinical settings that involve acute or unstable symptom patterns. The goal is to provide supportive relief when symptoms interfere with routine activities.

The product assists with managing symptoms related to inflammatory or irritative states. In clinical applications:

“The combination product... helps address the bacteria associated with acne and provides a mild antiseptic effect.”

Overall, it contributes to improved comfort during periods of heightened symptoms and supports patients during episodes of heightened discomfort.

Quick Fact: Support for Symptom Burden

Regulatory References

  1. NIH DailyMed Prescribing Information
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Eligibility and Restrictions for Use

Who Can and Cannot Use Benzolac Cl?

The population eligibility for using Benzolac Cl (Clindamycin and Benzoyl Peroxide) is strictly defined by regulatory authorities based on age and pre-existing medical conditions.


Contraindications and Non-Eligibility

The medicine is strictly contraindicated and must not be used by individuals who have:

  • A history of hypersensitivity or allergic reaction to clindamycin, lincomycin, benzoyl peroxide, or any other component of the formulation.
  • A history of specific inflammatory gastrointestinal diseases, including regional enteritis, ulcerative colitis, or antibiotic-associated colitis.

Age and Special Population Eligibility

Population Group Regulatory Status
Approved Minimum Age Approved for use in patients 12 years of age and older.
Children under 12 Use is not established and not recommended.
Pregnancy Use is conditional (Pregnancy Category C); permitted only if the potential benefit justifies the potential risk.
Lactation Use requires caution. Application to the breast area must be avoided.

These official eligibility rules ensure that use of the combination product is limited to the defined population where safety and efficacy have been established, while strictly excluding high-risk groups as mandated by government labeling.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

The official interaction profile for this topical combination is structured around potential systemic effects from the Clindamycin component and local chemical incompatibility from the Benzoyl Peroxide component, as documented in regulatory sources.


Documented Drug–Drug Interactions

Interacting Substance Category Interaction Effect Officially Described
Neuromuscular Blocking Agents (NMBAs) Clindamycin has neuromuscular blocking properties that may enhance the action of these agents, such as tubocurarine. This is a pharmacodynamic potentiation.
Erythromycin-containing Products Co-administration is restricted due to the potential for antagonism against the Clindamycin component.
Topical Vitamin A Derivatives (Retinoids) Benzoyl Peroxide may reduce the efficacy of retinoids, such as tretinoin, through chemical oxidation.

Administration Timing and Restrictions

Use with other topical acne preparations requires caution due to the potential for cumulative local irritation. To mitigate the risk of chemical inactivation or increased irritation, products containing Retinoids or other topical agents must not be applied simultaneously and may require separation of administration times. Topical sulfonamide-containing products, including Dapsone, may cause a temporary yellow or orange discoloration of the skin and hair when used concurrently.

Population-Specific Interaction Notes

This product is formally contraindicated in patients with a history of regional enteritis, ulcerative colitis, or antibiotic-associated colitis. This restriction is due to the potential, though rare, risk of systemic absorption of the Clindamycin component precipitating severe colitis, which links a pre-existing condition to a drug exposure risk.

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Mechanism of Action

Targeting Microbial Metabolism and Structure

Benzolac Cl employs a dual-action mechanism to modulate the local biological environment within the skin's oil glands. The key mechanistic actions involve the synchronized targeting of microbial processes, follicular physiology, and bacterial resistance development. The Clindamycin component engages a mechanism that directly suppresses bacterial protein synthesis by binding to the Cutibacterium acnes 50S ribosomal subunit. Concurrently, the Benzoyl Peroxide component rapidly initiates a signaling sequence by decomposing into free radicals, which inflict non-specific oxidative damage to the C. acnes structure. This synergistic interaction results in a reduction in the microbial population density.


️ Synergy to Limit Resistance and Modulate Follicular Structure

The mechanism engages cascades that affect follicular processes and microbial survival selection. The rapid oxidative action of Benzoyl Peroxide significantly curtails the overall microbial population, which limits the opportunity for C. acnes to develop or acquire resistance mechanisms against the Clindamycin antibiotic. Furthermore, Benzoyl Peroxide promotes cell turnover through its keratolytic mechanism, which reduces the adhesion of cells within the follicular duct and facilitates the penetration of the antibiotic.

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Dosage and Administration Information

How to Use Benzolac Cl: Official Administration Guidelines

Benzolac Cl (clindamycin and benzoyl peroxide topical gel) is administered according to a specific regimen to ensure proper application and efficacy within established clinical parameters.


Administration Scope

Category Instruction
Route of administration Topical (Cutaneous) use only. The product is not for oral, ophthalmic, or intravaginal administration.
Dosing schedule A thin layer of the gel is applied to the entire affected area.
Frequency and timing Applied once daily, typically in the evening.
Preparation requirements The application area must be gently washed, rinsed with warm water, and patted dry before the gel is applied.
Age-group rules Use is indicated for patients 12 years of age and older. Safety and efficacy are not established for children younger than 12.
Course duration Continuous treatment should not exceed 12 weeks.

Resulting Procedural Structure

The official protocol mandates a preparatory step where the skin is cleansed and dried before application. A thin layer of the product is then applied to the entire area intended for treatment. Application must strictly avoid contact with sensitive areas, including the eyes, mouth, lips, and other mucous membranes. The administration is restricted to a once-daily schedule and a maximum treatment course of 12 continuous weeks.

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Recent Clinical Evidence

Benzolac Cl: Recent Clinical Evidence

Evidence for use in Moderate to Moderately Severe Acne Vulgaris

The primary evidence base for this combination product is supported by Randomized Controlled Trials (RCTs). These short-term studies were conducted to monitor people with moderate to moderately severe acne and examine how symptoms change over time. Studies evaluated specific outcomes, primarily focusing on outcomes linked to inflammatory or irritative states. This involved counting the change in both inflammatory lesions (such as papules and pustules) and non-inflammatory lesions (comedones). Research highlights changes measured during the study period, and the data describe the way lesion counts and global scores evolved in the observed populations.

Comparison of Combination Therapy in Clinical Trials

Research has examined the measurements recorded when comparing this combination to other applications. This product was evaluated in studies designed to compare it against a non-active vehicle gel (a substance without medication) and against the individual active components (monotherapies). These comparison trials recorded and reported data for the measured outcomes across the various groups, providing data for results when participants used the combination versus the monotherapies or the vehicle gel.

Research on Long-Term Outcomes and Follow-Up

Key research studies were typically concentrated on short, controlled timeframes, with follow-up periods generally limited to 10 to 12 weeks. As such, long-term effects are not fully established because the research was not designed to track outcomes over periods longer than several months. There is limited information for long-term outcomes regarding the sustained consistency of the observed patterns.

Evidence in Specific Patient Groups

The research has primarily focused on specific groups. The product was studied for use in Adolescents (age 12 and older) and Adults who were diagnosed with moderate to moderately severe facial acne. Results apply only to the populations studied in these controlled environments. Data for certain groups remain insufficient, such as patients with more severe or nodular forms of acne, and there is less information available for application to areas of the body other than the face.

Areas of Research Uncertainty and Study Limitations

While the combination product was evaluated in numerous trials, some areas of uncertainty remain. Evidence quality varies across studies, and the sample sizes were modest in some analyses. Data comparing the product to a comprehensive range of other available acne regimens are limited, meaning direct comparisons to all alternatives have not been widely established. The research highlights what is known — and what is still uncertain — about the combination product.

Key Studies & References

  1. Clindamycin Phosphate and Benzoyl Peroxide Gel Prescribing Information (DailyMed)
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Frequently Asked Questions (FAQ)

Common questions about Benzolac Cl (FAQ)


Q: Can Benzolac Cl be used for acne that is not severe?

Official product information indicates that the medicine is supported by evidence primarily in people with moderate to moderately severe acne vulgaris. This means the indication is for acne in patients aged 12 years and older within that severity range. Use outside of the severity level described in clinical evidence has not been fully evaluated.

Q: What kinds of blemishes is Benzolac Cl typically intended to treat?

The medication is indicated for the treatment of acne vulgaris. Studies and official information show that clinical trials evaluate its effectiveness based on the changes observed in both non-inflammatory lesions (such as comedones) and inflammatory lesions (such as papules and pustules).

Q: Can Benzolac Cl be used as a long-term maintenance treatment?

According to the official product instructions, continuous use of this medication beyond 12 weeks has not been evaluated in clinical trials. Treatment duration is typically managed within this established timeframe.

Q: Is it true that Benzolac Cl can cause temporary discoloration on hair or colored fabrics?

Yes, official patient information states that the benzoyl peroxide component may bleach hair or colored fabric. This characteristic suggests that users should take care to prevent contact with clothing, linens, and hair.

Q: Does Benzolac Cl affect the use of other cosmetic products like moisturizers?

Official patient counseling information suggests caution when using this product with other topical skin preparations. The potential exists for a cumulative irritancy effect on the skin when combined with other drying, irritating, or abrasive topical products, as noted in official patient counseling information.

Q: Is Benzolac Cl effective for non-acne skin conditions?

Regulatory documents state that this product is indicated only for the topical treatment of acne vulgaris. The medication has not been evaluated for use in other skin conditions.

Q: Can Benzolac Cl be used alongside an oral antibiotic treatment for acne?

Official information indicates that the use of this product alongside other systemic antibiotics is an area requiring careful consideration. This is due to the potential for systemic absorption of clindamycin and the potential for a severe side effect, such as clindamycin-related colitis, when combining antibiotics.

Q: What is the typical appearance of skin irritation caused by the medication?

Common local skin reactions documented in official adverse event sections include erythema (redness), dry skin (xerosis), and peeling (desquamation). A burning sensation at the application site is also classified as a common adverse reaction.

Q: Are there specific studies on Benzolac Cl use in different skin types?

Clinical trial data officially supports the use of the product in Adolescents (age 12 and older) and Adults. However, official labeling also notes that the medication can cause skin irritation, which may be more bothersome on sensitive skin.

Q: Is Benzolac Cl available in different strengths?

Yes, regulatory documents describe that the gel is available in multiple concentrations of its active components. These different formulations vary the percentage of clindamycin phosphate and benzoyl peroxide.

Q: Does the use of makeup affect how Benzolac Cl works?

Official patient counseling information advises caution with the concomitant use of any other topical preparation. This is due to the potential for a cumulative irritancy effect when combining topical preparations.

Q: What does the research indicate about Benzolac Cl's ability to prevent future breakouts?

Studies and the product's mechanism of action indicate that it reduces the population of C. acnes bacteria. Additionally, the product promotes cell turnover through its keratolytic mechanism (an action that sheds dead skin cells), which is consistent with addressing factors related to new lesion formation.

Q: Is it necessary to use a special cleanser before applying Benzolac Cl?

Official administration instructions state that before applying the gel, the affected area should be washed gently with a mild soap or cleanser. The area should then be rinsed with warm water and patted dry before the product is applied.

Q: Can the skin dryness and irritation from Benzolac Cl be managed with a simple moisturizer?

Official information indicates that a mild, non-irritating moisturizer may be used, as needed, to help minimize or manage excessive dryness associated with the medication. Patients are advised to minimize sun exposure and avoid using other irritating skin products.

Q: What are the facts about combining Benzolac Cl with products containing salicylic acid?

Concomitant topical acne therapy should be used with caution. This is because combining the product with peeling, desquamating, or abrasive agents (which includes salicylic acid) can result in a possible cumulative irritancy effect on the skin.

Q: Why is it important to check the expiration date on Benzolac Cl products?

The medication must be stored at a Controlled Room Temperature (approximately 20 C to 25 C) to ensure stability. Specific formulations may have stability requirements or a requirement to discard any unused product after a defined period, which is why expiration dates should be respected.

Q: Is there evidence about the use of Benzolac Cl for body acne?

The product is indicated for the topical treatment of acne vulgaris. However, clinical trials that form the primary evidence base primarily focused on facial acne. There is less specific information available for application to areas of the body other than the face.

Q: What information is available about Benzolac Cl's effects on sensitive skin?

Official labeling states that the medication can cause common local adverse reactions such as skin irritation, redness, and peeling. These reactions might be more pronounced or bothersome if the skin is already sensitive.

Q: Is Benzolac Cl associated with any long-term health risks described in regulatory information?

The most significant systemic risk outlined in official warnings is the potential for Antibiotic-Associated Colitis from the clindamycin component. However, regulatory documents also state that the safety and effectiveness of using the product beyond 12 weeks has not been established in clinical trials.

Q: How long does it usually take before any changes are noticed when using Benzolac Cl?

Official documents note that local skin reactions, such as redness and peeling, are often more noticeable during the initial weeks of treatment. While research examines changes over time, studies generally track results up to 10 to 12 weeks of continuous use.

Q: What is the reason Benzolac Cl may cause increased skin sensitivity to sun exposure?

The official warning regarding sun exposure is due to the Benzoyl Peroxide component. It is a fact that this component may cause increased skin sensitivity to sunlight, necessitating caution against prolonged exposure.

Q: What ingredients should generally be avoided when using Benzolac Cl to minimize skin irritation?

Regulatory warnings mention potential caution when using other topical preparations, specifically those described as irritating, abrasive, or peeling agents. Combining such products can result in a cumulative irritancy effect on the skin.

Q: What are the characteristics of a serious allergic reaction that necessitate medical attention?

Though rare, the official safety profile includes severe allergic reactions like anaphylaxis (a whole-body reaction) and urticaria (hives). Official documentation describes symptoms consistent with a severe reaction, such as swelling of the face, throat, or tongue, and difficulty breathing.

Q: Is sun exposure completely forbidden while using Benzolac Cl?

Official patient counseling information advises caution against prolonged sun exposure and exposure to sunlamps or tanning beds due to the potential for increased sensitivity. This warning suggests the need for protective measures, but it does not state that all sun exposure is completely forbidden.

Q: Are there specific warnings regarding use on skin areas with cuts or scrapes?

The official administration instructions strictly caution users to avoid application to sensitive areas, including mucous membranes (like the eyes and mouth). Application is generally restricted to intact skin and must avoid contact with areas of the body defined as mucous membranes.

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How should Benzolac Cl be stored and disposed of?

How to Store and Dispose of Benzolac Cl (Clindamycin Phosphate and Benzoyl Peroxide Gel)

Benzolac Cl must be stored according to strict regulatory conditions to ensure its stability. The medication requires storage at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F).

Mandatory Storage and Stability Rules

Storage Requirement Condition
Temperature Range 20 C to 25 C
Freezing Restriction Do not freeze; discard product if it has been frozen
Container Rule Keep the tube tightly closed
Safety Rule Keep out of the reach of children

Official Disposal Instructions

Unused or expired Benzolac Cl must be disposed of according to local requirements. Official guidance advises against discarding the gel by flushing it down a toilet or pouring it into a drain.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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