Medline

White Petrolatum is a highly refined semi-solid mixture of hydrocarbons used primarily as an occlusive skin protectant and emollient. It belongs to the class of skin protectants and is frequently used as a standardized vehicle in chemical allergen testing.

For general skin protection and treatment of dry skin, White Petrolatum does not have a strict milligram-per-kilogram dosage. Instead, it is applied topically based on the size of the affected area.

• Dry Skin/Chapped Lips: Apply a thin layer to the affected area as needed, typically 2 to 4 times daily, or more frequently if the skin is exposed to water or wind.
• Minor Wound Care: After cleaning the wound with mild soap and water, apply a generous layer of White Petrolatum to cover the entire wound bed. Reapply every 12 to 24 hours or whenever the dressing is changed.
• Post-Surgical Sites: Follow the 'soak and smear' protocol if directed—clean the area, pat dry, and immediately apply petrolatum to lock in moisture.

White Petrolatum is considered safe for use in pediatric populations, including newborns.

• Diaper Rash: Apply White Petrolatum liberally with every diaper change, especially at bedtime or whenever exposure to wet diapers may be prolonged. Ensure the skin is clean and dry before application.
• Atopic Dermatitis (Eczema): In children with eczema, healthcare providers often recommend applying petrolatum within three minutes of bathing (the '3-minute rule') to maximize hydration.

Renal Impairment

Because White Petrolatum is not systemically absorbed and is not cleared by the kidneys, no dosage adjustments are required for patients with renal failure or those on dialysis.

Hepatic Impairment

There is no hepatic metabolism involved in the use of topical White Petrolatum. Therefore, no adjustments are necessary for patients with liver disease.

Elderly Patients

Elderly patients often have 'thin' or 'parchment-like' skin (asteatotic eczema). White Petrolatum is highly recommended for this population, but care should be taken as the greasy residue can make surfaces slippery, increasing the risk of falls if applied to the soles of the feet.

White Petrolatum is for external use only. It should never be ingested or injected.

1. 1Cleanse: Before application, wash your hands and gently clean the area of skin to be treated.
2. 2Apply: Use clean fingertips or a sterile tongue depressor to scoop the ointment. Spread it gently over the skin. You do not need to rub it in completely; a visible layer is often more effective for protection.
3. 3Frequency: For chronic dry skin, application is most effective when the skin is already damp (e.g., after a shower).
4. 4Storage: Store at room temperature (15°C to 30°C or 59°F to 86°F). Avoid excessive heat, which can cause the mixture to liquefy, though it will solidify again upon cooling without losing efficacy.

If you forget to apply White Petrolatum, apply it as soon as you remember. If it is almost time for the next scheduled application, skip the missed one. Because it is a topical protectant, missing a dose does not carry the same risks as missing systemic medications, but it may lead to a temporary return of skin dryness or irritation.

Topical overdose is virtually impossible. However, 'over-application' can lead to skin maceration (over-hydration of the skin, making it look white and soggy) or clogged pores (folliculitis).

Accidental Ingestion: If a child or adult swallows a large amount of White Petrolatum, it may act as a laxative, leading to diarrhea and abdominal cramping. It is generally non-toxic, but you should contact a Poison Control Center or seek medical attention if aspiration (inhaling the substance into the lungs) is suspected.

> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose without medical guidance.

While White Petrolatum is one of the most inert substances used in medicine, its physical properties can cause localized issues:

• Greasy Skin Feel: Due to its occlusive nature, the skin will feel oily or 'tacky' for several hours after application. This is a standard characteristic of the drug and not an adverse reaction.
• Staining of Clothing: The hydrocarbons can transfer to fabrics, potentially leaving oily stains that are difficult to remove.
• Skin Maceration: If applied too thickly to areas that are already moist (like skin folds), the skin may become overly hydrated, appearing white, wrinkled, and soft. This can increase the risk of secondary fungal infections.

White Petrolatum is intended for external use only. It should never be used as a lubricant for internal procedures unless specifically formulated and sterile. Patients should be aware that while it is a simple product, misuse can lead to complications, particularly regarding respiratory health and fire safety.

No FDA black box warnings for White Petrolatum.

• Aspiration Risk: A critical safety warning involves the use of White Petrolatum in or around the nose. The Mayo Clinic and other major health organizations warn against using petroleum-based products for nasal dryness. Over time, the jelly can migrate down the posterior pharynx and into the lungs, leading to exogenous lipoid pneumonia, a condition that can be difficult to treat and may cause permanent lung scarring.

• Latex Products (Condoms and Diaphragms): White Petrolatum is a petroleum-based hydrocarbon that acts as a solvent for latex. It can weaken latex significantly within minutes, leading to microscopic tears or total breakage. This increases the risk of unintended pregnancy and the transmission of sexually transmitted infections (STIs). Water-based or silicone-based lubricants should be used instead.

• Oxygen Therapy: White Petrolatum is combustible. Patients using supplemental oxygen (nasal cannulas or masks) should never use petroleum-based products on their face or in their nose. In an oxygen-rich environment, the petroleum can ignite more easily, leading to severe facial burns. Use water-based moisturizers instead.
• Topical Corticosteroids: Applying White Petrolatum over a topical steroid (like clobetasol or hydrocortisone) can significantly increase the absorption and potency of the steroid due to the 'occlusion effect.' While sometimes used therapeutically, this can also increase the risk of side effects like skin thinning (atrophy) or systemic absorption of the steroid. Always consult your doctor before 'stacking' topical medications.

White Petrolatum must NEVER be used in the following circumstances:

• Known Hypersensitivity: If you have a documented allergy to petrolatum or any of its refined hydrocarbon components, use is strictly prohibited. Although rare, allergic reactions can cause significant dermatitis.
• Oxygen Use: As mentioned in the interactions section, the risk of combustion in the presence of concentrated oxygen makes its use on the face or nose an absolute contraindication for patients on oxygen therapy.
• Active, Untreated Skin Infections: Applying an occlusive barrier over a site of active bacterial (e.g., impetigo), viral (e.g., herpes simplex), or fungal infection can worsen the condition by trapping the pathogen and providing a moist environment for growth.

FDA Pregnancy Category: Not Formally Assigned (Generally considered safe).

White Petrolatum is not systemically absorbed. Therefore, it does not reach the developing fetus and is not associated with any known teratogenic risks (birth defects). It is widely used by pregnant women to treat dry skin and prevent stretch mark irritation. There are no trimester-specific risks associated with topical application.

White Petrolatum is safe for use during breastfeeding. It does not pass into breast milk because it does not enter the mother's bloodstream.

• Precaution: If applying to the breasts to treat cracked nipples, ensure the area is thoroughly cleaned before the infant latches. While non-toxic, the infant should not ingest large amounts of the ointment, as it could cause diarrhea or interfere with feeding.

White Petrolatum functions as a physical occlusive barrier. It does not bind to receptors. Instead, it fills the gaps between desquamating (peeling) corneocytes in the stratum corneum. By creating a continuous hydrophobic film, it increases the water content of the skin by preventing evaporation. This hydration of the skin causes the 'plumping' of the cells, which smoothes the skin surface and reduces the sensation of pain and itching associated with dryness.

• Dose-Response: The effect is directly proportional to the surface area covered and the thickness of the layer.
• Onset of Action: Immediate. The barrier is formed as soon as the product is applied.
• Duration: Typically lasts 4 to 8 hours on exposed skin, but can last much longer if covered by clothing or a bandage.