Tirbanibulin (Topical) (Monograph)
Brand name: Klisyri [Web]
Drug class: Skin and Mucous Membrane Agents
Microtubule inhibitor; skin or mucous membrane agent.
Uses for Tirbanibulin (Topical)
Indicated for topical treatment of actinic keratosis (AK) of the face or scalp.
Guidelines generally recommend tirbanibulin as an option for topical treatment of AK.
Tirbanibulin (Topical) Dosage and Administration
Dispensing and Administration Precautions
After topical application of tirbanibulin, wash hands immediately with soap and water. Avoid application around the mouth and lips, and avoid transfer to the periocular area. Avoid washing or touching the treated area for approximately 8 hours after tirbanibulin application; after 8 hours, the area may be washed with mild soap.
Avoid application until skin is healed from any prior drug, procedure, or surgery.
Single-dose ointment packets for topical use only; not for oral or ophthalmic use.
Apply a sufficient amount evenly to cover up to a 25 cm2 treatment field.
Each 1% single-use ointment packet contains 2.5 mg of tirbanibulin in 250 mg.
Apply sufficient amount to evenly cover up to 25 cm2 treatment field on face or scalp once daily for 5 consecutive days.
No specific dosage recommendations at this time.
No specific dosage recommendations at this time.
No specific dosage recommendations at this time. No differences in safety or efficacy observed in geriatric patients; however, greater sensitivity cannot be ruled out.
Cautions for Tirbanibulin (Topical)
Ophthalmic Adverse Reactions
May cause eye irritation.
Avoid transfer into the eyes and periocular area during and after application. Wash hands immediately after application. Flush eyes with water and seek medical care as soon as possible if accidental exposure occurs.
Local Skin Reactions
Local skin reactions, including severe reactions (erythema, flaking/scaling, crusting, swelling, vesiculation/pustulation and erosion/ulceration) may occur after topical application. Avoid use until skin is healed from any previous drug, procedure, or surgery. Irritation more likely if treatment area is occluded after topical application of tirbanibulin.
No available data on tirbanibulin use in pregnancy.
Animal data indicate potential fetal harm with increased systemic exposure of tirbanibulin.
Not known whether tirbanibulin distributes into milk, affects milk production, or affects breast-fed infants.
Safety and efficacy not established.
Of 353 subjects with actinic keratosis treated with tirbanibulin in the Phase 3 trials, 70% were ≥65 years of age. No overall differences in safety or efficacy were observed between these subjects and younger adults; however, increased sensitivity of some older individuals cannot be ruled out.
Effects of hepatic impairment on pharmacokinetics of tirbanibulin not evaluated.
Effects of renal impairment on pharmacokinetics of tirbanibulin not evaluated.
Common Adverse Effects
Most common adverse reactions (incidence ≥2%): local skin reactions, application site pruritus, application site pain.
Formal drug interaction studies not conducted.
In vitro, principally metabolized by CYP3A4, and to a lesser extent, CYP2C8.
In vitro, no clinically meaningful effects on pharmacokinetics of drugs metabolized by CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, or CYP3A4, or drugs mediated by multidrug and toxin extrusion (MATE) transporter 1, MATE2-K, organic anion transporting polypeptide (OATP)1B1, OATP1B3, organic cation transporter (OCT)1, or OCT2.
Tirbanibulin (Topical) Pharmacokinetics
Following topical application of a mean daily dose of 138 mg of tirbanibulin to a 25 cm2 contiguous area of the balding scalp or face for 5 consecutive days, steady-state concentrations achieved within 72 hours.
Median time to achieve Cmax approximately 7 hours after application.
Low systemic exposure after 5 days of application; Cmax approximately 0.34 ng/mL ± 0.30 ng/mL and 0.18 ng/mL ± 0.10 ng/mL when applied to the face and scalp, respectively.
Not known if present in human milk.
Plasma Protein Binding
Primarily by CYP3A4, and to a lesser extent, CYP2C8.
Exposure to human hepatocytes in vitro generated KX2-5036 and KX2-5163, 2 pharmacologically inactive metabolites, and other unidentified metabolites.
Method of excretion not fully explained.
Store at 20–25°C; (excursions permitted between 15–30°C). Do not refrigerate or freeze.
Microtubule inhibitor; mechanism of action for the topical treatment of actinic keratosis unknown.
Advice to Patients
Advise the patient to read the FDA-approved patient labeling and instructions for use. Discard the packet after a single use.
Inform patients that tirbanibulin is not for ophthalmic use. Advise patients to avoid application around the eyes, and transfer of the drug into the eyes and to the periocular area. If accidental exposure occurs, advise patients to flush eyes with water and seek medical care.
Inform patients that treatment with tirbanibulin may lead to local skin reactions.
Advise patients that tirbanibulin is for topical use only. Advise patients to avoid application near and around the mouth and lips.
Instruct patients to wash hands well after applying tirbanibulin.
Instruct patients to avoid washing and touching the treated area for 8 hours after treatment. Following this time, patients may wash the area with a mild soap and water.
Instruct patients to avoid inadvertent transfer of tirbanibulin to other areas, or to another person.
Importance of informing clinicians of existing or contemplated concomitant therapy, including prescription and OTC drugs and dietary or herbal supplements, as well as any concomitant illnesses.
Importance of women informing clinicians if they are or plan to become pregnant or plan to breast-feed.
Importance of informing patients of other important precautionary information.
The American Society of Health-System Pharmacists, Inc. represents that the information provided in the accompanying monograph was formulated with a reasonable standard of care, and in conformity with professional standards in the field. Readers are advised that decisions regarding use of drugs are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and that the information contained in the monograph is provided for informational purposes only. The manufacturer’s labeling should be consulted for more detailed information. The American Society of Health-System Pharmacists, Inc. does not endorse or recommend the use of any drug. The information contained in the monograph is not a substitute for medical care.
Excipients in commercially available drug preparations may have clinically important effects in some individuals; consult specific product labeling for details.
Please refer to the ASHP Drug Shortages Resource Center for information on shortages of one or more of these preparations.
1% (2.5 mg tirbanibulin in 250 mg)
AHFS DI Essentials™. © Copyright 2023, Selected Revisions September 28, 2023. American Society of Health-System Pharmacists, Inc., 4500 East-West Highway, Suite 900, Bethesda, Maryland 20814.
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