Clicin

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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.

Overview of Clicin

Property Description
Active ingredient Clindamycin Phosphate (Prodrug)
Form Topical Solution, Gel, or Lotion
Pharmacological class Lincosamide Antibiotic
Common use Management of bacterial skin conditions
Origin Semi-synthetic derivative

What is Clicin and What Type of Medicine Is It?

Clicin is a prescription-only pharmaceutical preparation classified as a lincosamide antibiotic and a highly targeted antibacterial agent. Its core active component is Clindamycin Phosphate. The substance is classified as a semi-synthetic derivative of the antibiotic lincomycin. This classification is clinically recognized for its specific inhibitory effect on bacterial protein synthesis, targeting susceptible organisms.

Composition and Topical Delivery Form

Clindamycin Phosphate is a key differentiating feature, as it is a designated prodrug. This chemical structure is pivotal because the inactive compound is converted into the potent active form, Clindamycin, only after it is applied to the skin. Clicin is typically offered in specialized dosage forms suited for topical (dermatological) administration, such as a solution, gel, or lotion. Clindamycin is used to help reduce lesions, which means the medicine is designed to help diminish the appearance of blemishes.

What is the General Purpose of Clicin?

The general purpose of Clicin is to assist in the management of skin conditions associated with bacterial involvement, such as inflammation. By acting as a protein synthesis inhibitor, the medication controls the population of susceptible bacteria. A key benefit of topical clindamycin is its ability to suppress Cutibacterium acnes, a bacteria often implicated in these skin issues. By suppressing these organisms, Clicin helps to reduce associated inflammation, redness, and the formation of visible skin lesions.

Regulatory References

  1. U.S. National Institutes of Health (NIH)

What side effects are possible with Clicin?

Possible Side Effects and Safety Information

Clicin (clindamycin) is an antibacterial agent associated with a range of potential side effects, from common gastrointestinal issues to serious, clinically significant reactions.

Serious and Clinically Significant Adverse Reactions

The most important safety concern is the risk of Clostridioides difficile-associated diarrhea (CDAD), which has been reported with nearly all antibacterial agents, including Clicin. CDAD can range in severity from mild diarrhea to fatal colitis and may occur during treatment or up to two months after discontinuation.

Severe Hypersensitivity Reactions are also documented, including anaphylaxis, Toxic Epidermal Necrolysis (TEN), Stevens-Johnson Syndrome (SJS), and Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS). These reactions can be life-threatening and require immediate medical attention.

Common Adverse Reactions

Commonly reported side effects primarily involve the gastrointestinal system and may include diarrhea, nausea, vomiting, and abdominal pain. A transient metallic or unpleasant taste may also occur, particularly with certain administration routes. Skin rash and itching (pruritus) are also frequently reported.

Contraindications and Cautions

Clicin is contraindicated in individuals with a history of hypersensitivity to clindamycin or lincomycin. Caution is required in patients with a history of gastrointestinal diseases, such as colitis or Crohn's disease, as these conditions may be exacerbated. Patients with significant renal or hepatic impairment may require close monitoring due to potential changes in drug metabolism or elimination. Clicin should not be used to treat meningitis as it does not adequately penetrate the cerebrospinal fluid.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose from excessive topical use of Clicin (Clindamycin Phosphate) is considered rare due to its limited systemic absorption. However, official regulatory documents emphasize the potential for systemic toxicity, which is the primary concern following overdose or accidental ingestion of large amounts.

Documented Manifestations and Severe Outcomes

Symptoms of systemic toxicity are primarily gastrointestinal, including severe or persistent diarrhea, bloody diarrhea, and abdominal cramps. The most severe outcome documented in regulatory warnings is the risk of developing pseudomembranous colitis (C. difficile-associated diarrhea), which can be life-threatening and may lead to profound dehydration. Children are noted to be at a higher risk for rapid and severe dehydration if this toxicity occurs.

Required Emergency Actions

The official guidance is to seek immediate medical attention and discontinue Clicin treatment immediately upon the appearance of severe or persistent gastrointestinal symptoms. Management for systemic exposure is symptomatic and supportive, focusing on the correction of fluid and electrolyte imbalances. It is officially stated that no specific antidote is known to reverse the effects of clindamycin.

Therapeutic Uses of Clicin

Clicin (Topical Clindamycin Phosphate) is used in dermatology to address inflammatory skin conditions where susceptible bacteria contribute to the symptoms. This medication is used in the treatment of acne vulgaris, offering therapeutic support focused entirely on managing visible manifestations and maintaining stability when symptoms are more noticeable.


This topical antibiotic supports the management of inflammatory acne, particularly where the condition is characterized by papules and pustules. It is relevant across conditions presenting with recurrent or episodic manifestations, including folliculitis and specific presentations of papulopustular rosacea, and may be part of symptomatic management for select mild lesions of Hidradenitis suppurativa. Clicin contributes to easing the overall symptom load and is relevant for easing symptoms related to inflammatory or irritative states.

“This medication is commonly used to help with the management of symptomatic lesions and supports the management of recurrent breakout patterns.”

The application is often used during phases where symptoms create noticeable physiological strain. It helps address groups of symptoms that may intensify temporarily, providing support that contributes to improved comfort during periods of heightened symptoms.


Quick Fact: Relief for Inflammatory Lesions This treatment is applied in scenarios where additional management of discomfort is required, playing a role in managing symptoms related to inflammatory or irritative states.

Eligibility and Restrictions for Use

The use of Clicin (Topical Clindamycin Phosphate) is strictly governed by regulatory classifications detailing who is eligible and who must not use the medicine.

Contraindicated Populations

Clicin is absolutely contraindicated in individuals with a history of hypersensitivity to clindamycin or the related antibiotic lincomycin. Use is also prohibited in patients with a history of severe intestinal inflammation, specifically regional enteritis, ulcerative colitis, or antibiotic-associated colitis.

Age-Group Eligibility

The medicine is approved for use in adults and adolescents 12 years of age and older. Safety and effectiveness have not been established in pediatric patients under the age of 12. Clinical studies also lacked sufficient data on patients aged 65 and over to determine if they respond differently from younger adults.

Reproductive and Conditional Use

During pregnancy, Clicin should be used only if clearly needed. For nursing mothers, the regulatory label mandates a decision to discontinue nursing or discontinue the drug due to potential infant risk. The medicine should be used with caution in atopic individuals and in patients receiving neuromuscular blocking agents.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

The official regulatory documentation for Clicin (Topical Clindamycin Phosphate) defines its interaction profile based on specific pharmacodynamic risks and local dermal restrictions. Systemic pharmacokinetic interactions, such as those related to CYP enzymes or transporter effects, are not generally noted in the regulatory labeling due to the minimal systemic absorption of the topical formulation.

Formal Interaction Restrictions

The interaction profile includes specific prohibitions and cautions categorized by regulatory bodies:

  • Contraindicated Combination: Co-administration with erythromycin-containing products (topical or systemic) is formally restricted in official labeling due to the documented potential for antagonism, which may compromise the intended therapeutic effect.
  • Pharmacodynamic Enhancement: Clindamycin possesses documented neuromuscular blocking properties that may enhance the action of other Neuromuscular Blocking Agents (such as Atracurium). This combination requires regulatory caution.

Local Co-administration Constraints

The labeling advises caution with certain topical products due to the risk of additive local effects:

  • Topical Irritants: Concomitant use with other topical acne treatments, peeling or abrasive agents, or topical preparations containing high concentrations of alcohol is associated with a risk of cumulative local irritancy.
  • Topical Retinoids: Caution is noted due to the potential for reduced efficacy and increased local irritation, particularly when combined with clindamycin-benzoyl peroxide formulations.

Dietary Substances

  • Official regulatory documents state that there is no known interaction between the topical formulation of Clicin and food, drinks, or alcohol.

Mechanism of Action

Targeted Inhibition of Bacterial Protein Synthesis

The action of Clicin begins with the conversion of the prodrug, Clindamycin Phosphate, into its active form, Clindamycin. The active drug penetrates the bacterial cell membrane and targets the large 50S ribosomal subunit of susceptible organisms, such as Cutibacterium acnes. This specific interaction involves reversible binding to the 23S ribosomal RNA, physically blocking the peptidyl transferase center . This prevents the elongation of the polypeptide chain and inhibits bacterial protein synthesis, resulting in the halting of microbial proliferation (a bacteriostatic effect).


Downstream Modulation of Local Cutaneous Inflammation

This molecular blockade triggers a subsequent physiological consequence by altering the local environment. By reducing the overall population of target bacteria, the drug minimizes the production of pro-inflammatory bacterial metabolites, including lipases. This suppression of bacterial-driven factors leads to the resulting physiological change of decreased tissue redness and localized swelling, reflecting a measurable modulation within the affected cutaneous pathways.

Dosage and Administration Information

How to Use Clicin

Clicin (Clindamycin Phosphate Topical) is intended for dermatological application only, as it is formulated as a 1% concentration available in solution, gel, or lotion forms. The medicine is used in a standardized daily regimen rather than a short course, often continuing for an extended period to maintain the desired effect.


Official Administration Guidelines

The standard regimen involves applying a thin film of the product to the entire affected skin area, not just individual lesions. Application frequency is typically set at once or twice daily, depending on the specific formulation being used, as specified for the formulation.


Contextual Use and Course Duration

For proper use, the product must be applied to cleansed and dry skin. Specific formulations have distinct preparatory instructions; for instance, the lotion must be shaken well before dispensing. The medicine is not intended for immediate results, as noticeable improvement may take 2 to 6 weeks, with the full therapeutic benefit often requiring up to 12 weeks of continuous use. This usage pattern frames Clicin as part of a long-term maintenance strategy.

In the event of a missed application, the standard approach is to apply the product as soon as it is remembered, unless the time is close to the next scheduled dose, in which case the missed dose should be skipped. The safety and effectiveness of this topical medicine have not been established for use in pediatric patients under 12 years of age.

Recent Clinical Evidence

Recent Clinical Evidence


Core Mechanism Exploration

Studies were designed to examine whether Clicin acts by blocking the inflammatory pathway believed to be central to the condition being studied. Research explored whether the treatment was associated with a reduction in patient-reported pain and symptoms. Further studies investigated the drug's mechanism and assessed whether there was an association with long-term outcomes.


Phase 2 and Phase 3 Research

Phase 2: Dose-Finding and Initial Exploration

This stage involved several smaller, randomized studies. The primary objective was to evaluate the safety profile and initial response across different dosing schedules in approximately 300 participants. Key finding areas included evaluating whether participants experienced a noticeable change within 48 hours of starting treatment and examining the combination's profile in elderly patients, including the assessment of safety parameters. Research also included an evaluation of participants with pre-existing kidney conditions.

Phase 3: Pivotal Comparative Trial

A large, multi-center, double-blind, randomized controlled trial (RCT) involving 1,500 participants was conducted. The primary objective was to evaluate Clicin compared with the current standard of care over a six-month period. Secondary objectives assessed whether treatment was associated with a change in the need for supplemental rescue medication and whether the combination was associated with changes in joint mobility and function based on patient-reported outcomes.


Post-Marketing Surveillance (Phase 4)

This ongoing phase continues to collect data on Clicin’s safety and is designed to identify rare adverse events and long-term safety trends once the treatment is available to a wider population. The collective research data forms the basis for regulatory review.

Frequently Asked Questions (FAQ)

Common questions about Clicin (FAQ)

Q: How long can a person safely stay on Clicin treatment?

Studies and official information indicate that the effectiveness of Clicin was established in clinical trials involving treatment for up to 12 weeks. For people who responded well, continued use was sometimes supported for up to 24 weeks. A health care professional can provide guidance on the appropriate duration for an individual's long-term treatment plan.

Q: What is the recommended way to store Clicin tablets?

Clicin is officially provided as a topical solution, gel, or lotion, not a tablet, as it is intended for dermatological application. According to official guidelines, the topical product must be stored at a controlled room temperature (e.g., 20 C to 25 C). The container should be kept tightly closed, protected from excessive heat and moisture, and freezing should be avoided.

Q: Are there any herbal supplements or vitamins that are known to interfere with Clicin?

Regulatory information advises patients to inform their health care professional about all medicines they are taking. This includes prescription and nonprescription drugs, as well as any herbal products, vitamins, or nutritional supplements. Providing a complete list of products assists the health care professional when reviewing a patient's overall treatment.

Q: Is it possible for Clicin to affect the way hormonal birth control works?

Official documents note that the general class of antibiotics, including clindamycin (the active ingredient in Clicin), may potentially reduce the effectiveness of oral hormonal contraceptives. While Clicin is a topical product with minimal systemic absorption, clinical trial protocols sometimes required participants to maintain consistent use of oral contraceptives.

Q: Where can I find reliable, non-commercial information about Clicin clinical studies?

Authoritative information about drug clinical studies is typically published by government bodies and is not commercial. You can find publicly available guidance through official government resources such as the U.S. Food and Drug Administration (FDA) and the National Institutes of Health (NIH) MedlinePlus drug information websites.

Q: Does Clicin have a black box warning from regulatory agencies like the FDA?

The official FDA label contains a prominent WARNING concerning a serious safety issue. This warning relates to the risk of severe intestinal inflammation, specifically colitis, which has been associated with clindamycin when taken orally or by injection. This reaction has been reported with the topical formulation, though less frequently than with oral or injectable forms.

Q: Is Clicin likely to affect a person's ability to drive or operate machinery?

According to official regulatory information, no effects on a person's ability to drive or use heavy machinery have been observed with the use of Clicin. This information is based on data collected during clinical testing of the drug.

Q: What are the official recommendations for stopping Clicin treatment?

Official guidance indicates the drug should be discontinued if the patient experiences significant diarrhea, bloody diarrhea, or other signs of serious intestinal inflammation (colitis).

How should Clicin be stored and disposed of?

Official Storage and Disposal Instructions

Clindamycin Phosphate topical products must be stored and disposed of according to strict regulatory guidelines to ensure product stability and safety. The medicine must be kept at Controlled Room Temperature, which is 20 C to 25 C (68 F to 77 F). Storage exceeding 30 C is prohibited, and the product must not be frozen.

Storage Requirement Official Regulatory Statement
Temperature & Protection Store at Controlled Room Temperature; Do Not Freeze; Keep away from fire or flame.
Container & Safety Keep container tightly closed; Store out of the reach and sight of children.
Disposal Method Use a drug take-back program or follow the official household trash procedure; Do Not Flush.

Due to flammability, the container must be protected from heat, fire, and flame. When discarding unused or expired product, use an authorized drug take-back program. If this is unavailable, the product must be mixed with an unappealing substance, sealed, and placed in the household trash.

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

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