Lanolin is a topical emollient (skin softener) and occlusive moisturiser. It is often used for sore and cracked nipples in breastfeeding mothers, diaper rash, dry and chapped skin, chapped lips, radiation dermatitis, and minor skin irritation. Lanolin works by forming a breathable, semi-occlusive film on the skin that reduces transepidermal water loss (TEWL), softens the stratum corneum (primary skin barrier), and protects from friction, wind, and chemical irritants.

[Lanolin is a pharmaceutical-grade emolient that has a natural mixture of long-chain fatty acid esters, lanolin alcohols, sterols (including cholesterol), and other lipids. Chemically and physiologically, it closely mimics the lipids of human skin (vernix caseosa and sebum), making it highly effective as an emollient and barrier-repair agent. Lanolin does not contain pesticide residues and detergents, making it safer for sensitive use such as nipple care during breastfeeding.

It is available as ointments, creams, nipple creams, nasal sprays, ophthalmic lubricant ointments, and compound preparations with vitamin A, vitamin D, zinc oxide, and other ingredients. Lanolin is used both as an active ingredient and as a pharmaceutical excipient (inactive).

Unlike medicated creams containing steroids, antibiotics, or antifungals, Lanolin’s action is physical and supportive. It restores and protects the epidermal barrier while the underlying cause of damage is addressed. The systemic absorption of Lanolin is negligible; therefore, it is considered safe during pregnancy and breastfeeding, and for people across all age groups, including infants.

Sore, cracked, or irritated nipples from breastfeeding

Forms an occlusive film, helping damaged nipple skin retain moisture and heal.

Dry, scaly and eczema-prone skin

Softens and hydrates the skin, lowering itching and cracking.

Diaper rash in infants

Protects against moisture, urine, and faecal irritants.

Chapped lips, hands, heels, and cuticles

Replaces lost skin lipids and shields against wind and cold.

Radiation-induced dermatitis

Soothes and protects irradiated skin during radiotherapy.

Minor skin injuries

Treats minor burns, abrasions, chafing, and windburn.

Ophthalmic lubricant

Relieves dry eye symptoms.

Pharmaceutical excipient

Used as a base in many topical and ophthalmic formulations.

• Highly effective emollient and occlusive that helps reduce TEWL by 20 to 30% and makes the damaged skin supple again.

• Chemically similar to human skin lipids, so it blends into the stratum corneum and supports barrier repair.

• Safe for newborns and breastfeeding mothers. Highly purified, pharmaceutical-grade lanolin does not need to be wiped off before feeding.

• Negligible systemic absorption, making it a very low risk in pregnancy and breastfeeding.

Common

• Mild stickiness or greasiness at the application site

• Temporary redness or warmth after application

Uncommon

• Contact irritant dermatitis (itching, burning, stinging), especially on broken or inflamed skin

• Comedone formation (clogged pores) in acne-prone individuals

• Blurred vision with ophthalmic forms, usually temporary

Serious side effects requiring immediate attention

• Allergic contact dermatitis, which may present as severe itching, rash, swelling, or blistering at the site

• Anaphylactic-type reactions (very rare), which manifest as generalised rash, hives, facial swelling, or breathing difficulty

• Worsening infection or skin breakdown after applying over an unrecognised infection can trap exudate

Lanolin is for topical use only. Ensure the area is clean and dry before application. For breastfeeding nipple care, apply a pea-sized amount to the entire nipple and areola after each feed. With highly purified products, there is no need to wash off before the next feed. If latch pain persists beyond 48 to 72 hours, seek professional help. For diaper rash, clean and fully dry the nappy area and apply with each change. Avoid heavily exudative or clearly infected rashes without medical advice. For dry lips, hands, heels, and cuticles, apply 2 to 4 times daily during flares. For ophthalmic ointments, follow the instructions as prescribed, but the ointment is applied inside the lower eyelid, typically at bedtime, after removing contact lenses. Do not apply to deep wounds, infected skin, or animal bites without medical review. Keep away from the eyes unless using an eye-specific formulation.

The outer layer of the skin (stratum corneum) is built like a brick wall, where dead skin cells are held together by a 'mortar' of natural fats (ceramides, fatty acids, cholesterol, and cholesterol esters). This fatty matrix keeps water in, blocks irritants, and keeps the skin soft. When skin becomes dry, chapped, cracked, or inflamed, this matrix breaks down. This allows water to escape, resulting in stiffening of the skin and making it more vulnerable to damage.

Firstly, Lanolin, as an occlusive, forms a thin, flexible, semi-occlusive film that blocks water evaporation, reducing TEWL and allowing the skin's natural moisture reservoir to rise. Rehydrated corneocytes (dead cells that form the outermost layer of the skin) swell, close gaps between cells, and restore flexibility.

Secondly, as an emollient, Lanolins long-chain esters, sterols (including cholesterol), and fatty alcohols are chemically similar to human skin lipids. They integrate into the intercellular lipid matrix, effectively patching the damaged mortar between corneocytes, strengthening the barrier and smoothing the surface.

Third, by softening and sealing the surface, Lanolin reduces mechanical friction, allowing the epidermis to repair itself.

Finally, due to lanolin alcohol content, Lanolin can absorb and hold up to twice its weight in water, allowing it to act as an occlusive as well as a mild humectant.

There are no clinically significant food interactions with topical Lanolin, as systemic absorption is negligible. For ophthalmic Lanolin, food does not affect efficacy.

Topical corticosteroids

MILD

Apply the steroid first, then seal with Lanolin.

Topical antibiotics / antifungals

MILD

Apply the medicated product first and allow it to absorb before using Lanolin.

Topical retinoids (tretinoin, adapalene)

CAUTION

Occlusion can increase retinoid potency and irritation. Separate applications or avoid combining.

Other topical emollients / ointments

MILD

Multiple heavy occlusives on the same site may over-saturate skin and promote irritation or folliculitis.

Ophthalmic medications (drops)

CAUTION

Instil drops first and wait 30 minutes before applying Lanolin.

• Known lanolin / wool alcohol allergy (AVOID): It can cause severe allergic contact dermatitis.

• Skin infection (AVOID): Avoid thick occlusive application without treating the underlying infection.

• Chronic ulcers and deep wounds (CAUTION): It does not heal wounds; hence, it must only be used when prescribed.

• Acne vulgaris / rosacea (AVOID): It can aggravate comedones and facial flares.

• Severe atopic dermatitis with lanolin sensitisation (CAUTION): Avoid or do a patch test first.

Overdosing is extremely unlikely with topical medication as absorption is minimal through an intact skin. However, excessive application may macerate the skin or clog pores. These symptoms usually resolve with discontinuation and gentle cleansing. Ingestion in small amounts is generally not dangerous but may cause mild nausea or loose stools. In case of large ingestions, seek immediate medical help.

Lanolin is typically used as needed rather than on a fixed schedule. If you miss an application, simply apply the next dose when you remember or when the skin feels dry. For regular regimens (after each feed or diaper change), resume the usual routine at the next opportunity without doubling up.