Vicks VapoRub contains three ingredients that have some mosquito-repelling properties: camphor (4.8%), menthol (2.6%), and eucalyptus oil (1.2%). There is limited evidence that these compounds can deter certain mosquito species, but Vicks was never designed as a bug repellent, and it falls well short of products made for that purpose.
Why Vicks Has Some Repellent Effect
The three active ingredients in Vicks VapoRub each have some ability to discourage mosquitoes. A 2013 review found that camphor oil can repel certain mosquito species, and a 2012 study suggested menthol-containing products may also be effective. Eucalyptus oil, particularly the lemon eucalyptus variety, is well established as a natural mosquito deterrent. It works by masking the human scents mosquitoes use to locate you and interfering with their sense of smell.
A 2020 review noted that many people in Colombia regularly use Vicks VapoRub to repel mosquitoes or soothe bites, suggesting it has enough real-world effect that communities have adopted it as a folk remedy. The strong, volatile smell of the product likely creates a short-lived scent barrier around your skin that some mosquitoes find unpleasant.
Why It’s Not a Reliable Repellent
The concentrations of active ingredients in Vicks are low. At 4.8% camphor, 2.6% menthol, and 1.2% eucalyptus oil, these levels were formulated to relieve congestion, not to ward off insects. For context, EPA guidelines require insect repellents to provide at least a 50% repellency rate before they can claim to repel mosquitoes. Vicks has never been tested or registered under those standards.
The ingredients in Vicks are also highly volatile, meaning they evaporate quickly from your skin. This is useful when you’re inhaling vapors for a stuffy nose, but it means any repellent effect fades fast. Compare that to picaridin at 20% concentration, which protects against mosquitoes for 8 to 14 hours, or citronella at 4.2%, which still provides about an hour of protection in tested formulations designed to stay on the skin. Vicks has a thick, petroleum jelly base that may slow evaporation slightly, but it wasn’t engineered for sustained outdoor protection.
It’s also worth noting that the eucalyptus oil in Vicks is not the same as oil of lemon eucalyptus (OLE), which is the EPA-registered botanical repellent. At 30% concentration, OLE provides 4 to 6 hours of complete protection against several mosquito species. The standard eucalyptus oil in Vicks, at just 1.2%, is a different product at a fraction of the concentration.
How Proven Repellents Compare
DEET and picaridin remain the most effective mosquito repellents available. Picaridin works by creating a chemical shield on the skin that blocks mosquitoes from detecting you. At 20% concentration, it performs comparably to DEET at the same strength and lasts 8 to 14 hours. Even at 10%, it provides 3.5 to 8 hours of protection.
Oil of lemon eucalyptus is the strongest plant-based option with EPA registration. Studies suggest that 20 to 26% concentrations can match 15 to 20% DEET against both mosquitoes and ticks. These products are specifically formulated to release their active compounds slowly and stay effective on skin for hours, something Vicks simply cannot do.
Vicks Works Better for Treating Bites
Where Vicks actually shines is after you’ve already been bitten. Menthol activates cold receptors in the skin, creating a cooling sensation that overrides the itch signal. Camphor has mild anti-inflammatory and analgesic properties that can reduce swelling and discomfort. Applying a small dab of Vicks to a mosquito bite is a well-supported home remedy for relieving itching, and it’s likely more useful in this role than as a preventive measure.
Safety Concerns to Know About
Using Vicks on your skin occasionally is generally safe for adults, but slathering it over large areas of exposed skin as a repellent raises some practical issues. Camphor can cause skin irritation with heavy or repeated application. In higher concentrations, camphor is associated with serious toxicity, including confusion, seizures, and cardiac effects, though the 4.8% in Vicks is well below those thresholds.
The bigger concern is with children. Vicks should never be applied to children under two years old. There is a case report of an 18-month-old who developed respiratory distress after application. Menthol can trigger airway constriction in very young children, and accidental ingestion of camphor-containing products carries real poisoning risk. If you’re looking to protect a young child from mosquitoes, an EPA-registered repellent with clear pediatric guidelines is a far safer choice.
The Bottom Line on Vicks and Mosquitoes
Vicks VapoRub contains ingredients with genuine, if modest, mosquito-repelling properties. If you’re sitting on a porch and it’s the only thing you have on hand, rubbing some on exposed skin may reduce bites for a short time. But for any situation where mosquito protection actually matters, whether you’re hiking, traveling to an area with mosquito-borne disease, or spending extended time outdoors, a product containing DEET, picaridin, or oil of lemon eucalyptus will outperform Vicks by a wide margin and last many times longer.