A hot toddy can make you feel better when you have a cold, but the relief comes mostly from the hot water, honey, and lemon, not the whiskey. The alcohol itself doesn’t fight your cold and may actually slow your recovery. That said, a single hot toddy before bed is unlikely to cause harm for most adults, and the non-alcohol ingredients have genuine benefits worth understanding.
What a Hot Toddy Actually Contains
A traditional hot toddy is simple: about 2 ounces of whiskey or bourbon, a tablespoon and a half of honey, and a couple teaspoons of lemon juice, all stirred into hot water. Each of these ingredients has a different effect on your body when you’re sick, and separating them out helps explain why the drink feels so soothing even if it’s not truly medicinal.
The Ingredients That Actually Help
Honey is the standout. A Penn State study found that a dose of buckwheat honey before bedtime reduced the severity, frequency, and bothersome nature of nighttime coughing better than dextromethorphan, the cough suppressant in most over-the-counter cold medicines. Perhaps more striking, the researchers found that dextromethorphan performed no better than no treatment at all. Honey coats and soothes an irritated throat, and its thick consistency helps calm the cough reflex. This applies most clearly to the doses used in the study (given to children), but adults can expect similar throat-soothing effects.
Lemon juice adds a modest boost. One whole lemon contains about 44.5 milligrams of vitamin C, nearly half of the recommended daily value. A couple teaspoons of juice won’t deliver that full amount, but a 2016 study cited by the Cleveland Clinic found that adequate vitamin C intake can shorten the duration of common colds and upper respiratory infections. Every bit helps when you’re already eating and drinking less than usual.
Hot water itself does real work. Warm liquids help thin mucus, ease sinus pressure, and keep you hydrated. The steam from a hot mug can temporarily open nasal passages and make breathing easier. If you stripped the whiskey out of a hot toddy entirely, you’d still get most of the drink’s cold-fighting benefits.
What the Whiskey Does (and Doesn’t Do)
There is no evidence that alcohol helps with cold symptoms. Doctors generally recommend avoiding alcohol when you’re sick, and for several specific reasons.
First, alcohol is a diuretic. It suppresses a hormone called vasopressin that normally tells your kidneys to hold onto water. With less vasopressin circulating, your kidneys flush fluid faster than they should. When you already have a cold and are losing fluids through mucus production, sweating, and possibly fever, adding a dehydrating agent works against you. Dark distilled liquors like whiskey and brandy contain high levels of compounds called congeners that can worsen dehydration further.
Second, alcohol disrupts sleep. Even a small amount before bed fragments your sleep cycle, causing your brain to briefly wake up repeatedly throughout the night. This cuts into REM sleep, the deep restorative stage your body needs most when fighting off a virus. Less REM sleep means you wake up feeling less rested and your immune system gets less recovery time. Drinking less alcohol reduces this effect, so a single hot toddy is less disruptive than two or three, but the effect doesn’t disappear entirely.
Third, alcohol can lower immune function. Your body is actively fighting a viral infection, and even moderate alcohol consumption can dampen that response. This is why the general medical recommendation leans toward skipping alcohol when you’re sick.
The Warm Sensation Can Be Misleading
One reason people swear by hot toddies is the warm, open feeling in the sinuses and chest after a few sips. Alcohol causes blood vessels to dilate and constrict, which can create a temporary sensation of warmth and loosening. But this same process actually leads to swelling in the nasal passages, increased mucus production, and more congestion once the initial effect wears off. The relief is real but short-lived, and the rebound can leave you more stuffed up than before.
A Smarter Version of the Hot Toddy
If you enjoy the ritual of making a hot toddy when you’re under the weather, you can keep what works and minimize what doesn’t. Hot water with honey and lemon gives you the throat-soothing, cough-calming, hydrating benefits without the dehydration, sleep disruption, or immune suppression that comes with alcohol. Add a cinnamon stick or fresh ginger for warmth and flavor if you miss the whiskey’s bite.
If you do include the whiskey, keep it to one drink and avoid combining it with common cold medications. Many over-the-counter cold and flu products interact with alcohol, and mixing the two can amplify side effects or put extra strain on your liver. Check the label of anything you’re taking before adding whiskey to your mug.
The Bottom Line on Hot Toddies and Colds
A hot toddy is comfort, not medicine. The honey genuinely suppresses coughing, the lemon provides some vitamin C, and the hot water keeps you hydrated and loosens mucus. The whiskey makes you feel cozy for a few minutes but works against your body’s ability to recover. One hot toddy on a rough evening is unlikely to derail your recovery, but the non-alcoholic version does everything useful without the trade-offs.