Menthol cough drops do not raise blood pressure. Menthol itself acts as a mild vasodilator, meaning it relaxes blood vessel walls rather than constricting them. The Mayo Clinic even lists menthol cough drops as a safe option for people with high blood pressure who need to soothe a sore throat during a cold. That said, the story gets more nuanced when you look at what else might be in your cough and cold products.
How Menthol Affects Blood Vessels
Menthol works on blood vessels through several pathways, and most of them push blood pressure down rather than up. It blocks a type of calcium channel in the smooth muscle cells that line your arteries. When those channels are blocked, less calcium enters the cells, the muscle relaxes, and the vessel widens. This is actually the same basic mechanism used by some prescription blood pressure medications.
Menthol also appears to suppress a signaling pathway (called the ROCK pathway) that normally keeps blood vessels constricted. The net result in laboratory and animal studies is vasodilation, a widening of blood vessels that reduces pressure on artery walls.
There is one exception: when menthol is applied to the skin, it can trigger a reflex where the body constricts blood vessels in other areas to conserve heat. This is why your skin might feel cool after applying a menthol rub. But this reflex response is localized and temporary, and it’s specific to topical application, not to swallowing a cough drop.
What Clinical Studies Show
A systematic review and meta-analysis of randomized controlled trials looking at mint (Mentha) consumption found small reductions in blood pressure: roughly 1.2 mmHg for systolic and 1.8 mmHg for diastolic pressure compared to controls. These reductions weren’t statistically significant across all participants, meaning they could have occurred by chance in the general population. However, in people over 30 and those who already had elevated blood pressure (above 130/80), the reductions were both statistically and clinically meaningful, with long-term drops of about 3 mmHg for both systolic and diastolic readings.
These studies used mint preparations rather than pure isolated menthol, so the results reflect a mix of compounds found in the plant. Still, the direction is consistent: mint and menthol consumption tends to nudge blood pressure slightly downward, not upward.
The Real Concern: Other Ingredients
Where people with high blood pressure run into trouble isn’t with menthol cough drops. It’s with multi-symptom cold products that combine menthol with decongestants or pain relievers. Many cough, cold, and congestion products contain more than one active ingredient, and some of those ingredients genuinely do raise blood pressure.
Decongestants like pseudoephedrine and phenylephrine are the main culprits. They work by narrowing blood vessels in your nasal passages to reduce swelling, but that vessel-narrowing effect isn’t limited to your nose. It can raise blood pressure throughout your body. The American Heart Association and American College of Cardiology specifically flagged decongestants in their 2017 blood pressure management guidelines as medications that can increase blood pressure.
Non-steroidal anti-inflammatory drugs (NSAIDs) found in some combination cold products also raise blood pressure. The AHA recommends avoiding oral NSAIDs when possible if you have hypertension, suggesting acetaminophen or topical alternatives instead.
A plain menthol cough drop, the kind you pop for a scratchy throat, typically contains menthol as its only active ingredient. These are not the same as a multi-symptom cold medicine. Always check the label: if the only active ingredient listed is menthol, you’re in safe territory for blood pressure.
Menthol in E-Cigarettes Is a Different Story
One area where menthol has been linked to blood pressure increases is in e-cigarette aerosols, but this context is very different from a cough drop. A study published in the Journal of the American Heart Association exposed mice to menthol-flavored e-cigarette aerosols (with nicotine) and found sustained elevations in systolic blood pressure, increased heart rate, and even irregular heartbeats. These effects were unique to the menthol flavor compared to tobacco flavor, suggesting menthol inhaled at high temperatures alongside nicotine and other aerosol chemicals behaves differently than menthol dissolved in a lozenge.
The combination of nicotine, heated chemical carriers, and aerosolized menthol creates a fundamentally different exposure than sucking on a cough drop. If you vape menthol products and have blood pressure concerns, that’s worth a separate conversation with your doctor.
Sugar Content Worth Noting
Most regular menthol cough drops contain a few grams of sugar each. If you’re going through a bag a day during a bad cold, those calories add up. Chronically high sugar intake is linked to higher blood pressure over time, but the occasional use of cough drops during a cold isn’t going to move the needle. If you prefer to avoid the sugar entirely, sugar-free versions are widely available.
What to Watch For on the Label
If you have high blood pressure and are shopping for cough relief, here’s what to look for:
- Safe: Cough drops listing only menthol as the active ingredient
- Use cautiously: Products containing pseudoephedrine or phenylephrine (decongestants), which should be used for the shortest time possible
- Avoid when possible: Combination products with oral NSAIDs like ibuprofen or naproxen, which can raise blood pressure
Decongestants shouldn’t be taken for more than seven days without checking with a healthcare provider. If nasal congestion is your main problem, saline nasal sprays and antihistamines are alternatives that don’t affect blood pressure.