Indications for Urisec 40% Cream
Urisec (urea) 40% cream is indicated for localized areas of thick scale or hyperkeratosis, including hyperkeratotic conditions such as ichthyosis, psoriasis, xerosis, eczema, keratosis pilaris, keratoderma, corns and calluses, as well as damaged and devitalized nails. 1
Primary Indications
Hyperkeratotic Skin Conditions
The FDA-approved indications for urea 40% cream specifically include 1:
- Dry, rough skin
- Dermatitis
- Psoriasis
- Xerosis
- Ichthyosis
- Eczema
- Keratosis pilaris
- Keratosis palmaris
- Keratoderma
- Corns and calluses
Nail Conditions
Urea 40% is also indicated for 1:
- Damaged nails
- Ingrown nails
- Devitalized nails
- Onychomycosis (as adjunctive therapy)
Evidence-Based Applications
Congenital Ichthyoses
For ichthyosis, urea concentrations may be increased up to 40% specifically for localized areas of thick scale or hyperkeratosis, such as joints or palmoplantar regions. 2 The 2019 and 2024 European guidelines emphasize that while lower concentrations (≥10%) are used for general keratolysis, the 40% concentration is reserved for areas requiring more aggressive treatment.
Important age restriction: Urea should not be used in the neonatal period except on very limited areas such as palms and soles, and is not recommended before age 1 year except once daily on limited areas. 3 This is due to concerns about systemic absorption through the immature epidermal barrier.
Hand-Foot Skin Reactions from Chemotherapy
Urea 10-40% cream is recommended as a keratolytic agent for grade ≥3 or intolerable grade 2 hand-foot skin reactions (HFSR) from MEK inhibitors and other anticancer agents. 4 The ESMO 2021 guidelines specifically list urea 10-40% as a treatment option for severe HFSR, applied in combination with topical high-potency steroids.
Onychomycosis
While not a primary monotherapy, urea 40% serves as an effective nail avulsion agent to facilitate penetration of topical antifungals in onychomycosis treatment. 5 It is available as an over-the-counter preparation for this indication.
Application Instructions
Apply twice daily to affected skin or nails, rubbing in until completely absorbed. 1 For nail conditions, the softened affected nails should be removed as completely as possible with nail clippers and files during treatment. 6
Key Clinical Considerations
When to Use 40% vs. Lower Concentrations
- 10-20% urea: General scaling and hyperkeratosis on body surfaces
- 40% urea: Localized thick scale, hyperkeratosis at pressure points (heels, joints), palmoplantar keratoderma, and nail conditions 2, 3
Areas to Avoid
Do not apply to face, flexures, or areas of fissuring, as keratolytics may induce significant irritation in these sensitive areas. 2
Common Side Effects
The most common adverse events include 2:
- Itching
- Burning sensation
- Irritation
- Mild erosion (rare)
These are generally mild and non-systemic. 7
Storage and Handling
Store at room temperature 15°C-30°C (59°F-86°F), protect from freezing, and keep bottle tightly closed. 1