Imiquimod 3.75%
Vyloma
- Dosage form
- Tablet
- Available strengths
- 3.75%
- Drug class
- Topical immune response modifier
- Common brand
- Vyloma
Clinical overview. Imiquimod 3.75% cream (Vyloma) is a lower-strength, once-daily formulation used by the patient to treat external genital and perianal warts, applied nightly for up to 8 weeks. It is a distinct product from imiquimod 5% (used three times weekly for up to 16 weeks) with its own dosing schedule and maximum treatment duration. It does not eliminate the underlying HPV infection and is not recommended in pregnancy.
Indication
Common therapeutic uses
- Topical treatment of external genital and perianal warts (condyloma acuminata) in immunocompetent adults.
- Intended for use by the patient at home, after the diagnosis has been confirmed by a clinician.
- Not authorized for use in immunosuppressed patients; safety and effectiveness have not been established in this population.
Pregnancy
Risk assessment and monitoring considerations
- Animal reproduction studies did not show birth defects, but there are no adequate, well-controlled studies in pregnant women.
- Use during pregnancy only if the potential benefit justifies the potential risk to the fetus; discuss alternatives such as trichloroacetic acid, which is considered safe in pregnancy, with the prescriber first.
Breastfeeding
Infant exposure considerations
- It is not known whether topically applied imiquimod passes into breast milk. Use with caution while breastfeeding, and avoid applying the cream to any area that could have direct skin contact with the infant.
Geriatrics
Dosing and tolerability considerations
- No overall differences in safety or effectiveness have been observed between older and younger adults; monitor as in any patient given the possibility of greater skin sensitivity in some older individuals.
Pediatrics
Use in children and adolescents
- Not authorized for use in patients under 18 years of age; safety and effectiveness in children have not been established.
Dosage & Administration
Practical dosing and administration
- Apply a thin layer of cream to the external genital and/or perianal wart area once daily, immediately before bedtime.
- Continue nightly application for up to 8 weeks, or until the warts have completely cleared, whichever comes first — do not exceed 8 weeks of continuous use without reassessment.
- Wash hands thoroughly before and after application.
- Leave the cream on the skin overnight; wash the treated area with mild soap and water approximately 8 hours after application, in the morning.
- Apply only to the affected area; avoid application to open wounds, cuts, or abrasions, and avoid contact with the eyes, lips, and nostrils.
Overdose
Recognizing and responding to overdose
If overdose is suspected, seek emergency medical attention immediately or contact your regional Poison Control Centre without delay.
- Topical overuse (applying more than the recommended thin layer, or applying more frequently than once daily) increases the risk of severe local skin reactions; there is no established systemic overdose syndrome with correct topical use given minimal systemic absorption.
- Accidental oral ingestion should be treated as a potential exposure — contact Poison Control for guidance.
Common side effects
Frequently reported tolerability concerns
- Local application-site reactions: redness, itching, burning, pain, and irritation at and around the treatment site — these are expected and reflect the drug's immune-stimulating mechanism, but should be reported if severe.
Serious side effects
Findings that may require urgent assessment
Serious side effects require immediate discussion with the prescriber or emergency care.
- Severe local skin reactions, including erosion, ulceration, or blistering, which may require a treatment break or discontinuation.
- Flu-like systemic symptoms (fatigue, fever, myalgia) can occur, though less frequently than with the 5% strength, reflecting some systemic immune activation.
- Rare hypersensitivity reactions.
Use with caution
Situations requiring closer assessment
- Use with caution in patients with pre-existing autoimmune conditions, given the drug's immune-stimulating mechanism.
- Avoid use on broken or inflamed skin beyond the wart itself, which increases irritation and absorption.
Contraindications
Situations where therapy may be inappropriate
- Known hypersensitivity to imiquimod or any component of the cream.
Drug interactions
Clinically relevant combinations
- No clinically significant systemic drug interactions have been established, given minimal systemic absorption with correct topical use.
- Product interaction: may weaken latex condoms and vaginal diaphragms — an alternative barrier method should be used during treatment.
Food interactions
Meal-related administration
- None known.
Time of administration
Practical scheduling
- Apply at bedtime and leave on overnight; wash off approximately 8 hours later, in the morning.
Storage
Product handling
- Store at room temperature. Discard any unused portion of an opened single-use packet after application — do not reuse a partially used packet.
Patient take-away
Key counselling points for a quick closing summary
- Apply once daily at bedtime and wash off after about 8 hours; use for up to 8 weeks or until the warts clear, whichever is first.
- This cream does not eliminate the HPV infection itself — new warts can still appear, and the wart can still be transmitted to a partner during treatment and after clearance.
- May weaken condoms and diaphragms — use an alternative barrier method during treatment.
- Do not use during pregnancy unless your prescriber has specifically advised it.
- Stop treatment and contact your pharmacist or prescriber if you develop severe redness, blistering, or open sores at the application site.
References
Source material and product information
For professional reference. Confirm patient-specific decisions against the current approved product monograph and applicable clinical guidance.