Most colds last seven to ten days, but the right combination of rest, hydration, and a few evidence-backed remedies can shave a couple of days off that timeline and make the ones you’re stuck with far more bearable. There’s no cure for the common cold, but there’s a real difference between riding it out passively and actively helping your body clear the virus.
Start Zinc Lozenges Within 24 Hours
Zinc lozenges are the single most supported supplement for shortening a cold. A meta-analysis of seven trials found that people who used zinc lozenges had colds that were about 33% shorter than those who took a placebo. Zinc acetate lozenges performed slightly better (40% reduction) than zinc gluconate (28%), though the difference wasn’t statistically significant. The key is starting early, ideally within the first 24 hours of symptoms.
Doses of 80 to 92 mg per day worked just as well as doses above 190 mg per day, so there’s no benefit to mega-dosing. Look for lozenges that list zinc acetate or zinc gluconate as the active ingredient, and dissolve them slowly in your mouth rather than chewing or swallowing them. Some people experience nausea or a metallic taste, which usually goes away once they stop taking them.
Sleep More Than You Think You Need
Your immune system does its heaviest lifting while you sleep. People who habitually sleep five hours or less are significantly more vulnerable to respiratory infections and have worse outcomes when they do get sick, compared to those sleeping seven to eight hours. During a cold, your body needs even more rest than usual to mount an effective immune response.
This isn’t just about feeling better. Sleep deprivation measurably suppresses the immune cells responsible for fighting viral infections. If you can, take a day or two off work and aim for eight to nine hours at night, plus naps when your body asks for them. Propping your head up with an extra pillow can also help with nighttime congestion and coughing.
Stay Aggressively Hydrated
Hydration directly affects how well your airways clear mucus. Your respiratory tract is lined with tiny hair-like structures called cilia that sweep mucus (and the virus trapped in it) out of your airways. This system depends on a thin liquid layer staying well hydrated. When that layer dries out, mucus becomes thick and sticky, essentially gluing itself to your airway walls and forming plugs that slow clearance to a crawl.
When you add fluid back, the mucus swells, loosens, and moves faster. Under well-hydrated conditions, mucus transport speed roughly doubles. Water, herbal tea, broth, and diluted juice all count. Hot liquids have the added benefit of temporarily loosening congestion through steam. Avoid alcohol and excessive caffeine, both of which can dehydrate you.
Use Honey for Cough Relief
If a persistent cough is one of your worst symptoms, honey outperforms the most common over-the-counter cough suppressants. A clinical trial comparing honey to dextromethorphan (the “DM” in most cough syrups) and diphenhydramine found that a 2.5 mL dose of honey before bed reduced cough frequency and improved sleep quality more than either medication. Honey coats and soothes the throat, and it has mild antimicrobial properties.
Stir it into warm tea or take it straight off a spoon before bed. One important exception: never give honey to children under one year old due to the risk of botulism.
Rinse Your Nose With Saline
Saline nasal rinses do more than just relieve stuffiness temporarily. A randomized trial of over 400 children found that those using saline nose drops had cold symptoms for an average of six days compared to eight days with usual care. That’s a two-day reduction from something you can buy for a few dollars at any pharmacy. The children using saline also needed fewer medications overall.
The mechanism goes beyond simple flushing. The chloride in salt water is used by cells lining your upper respiratory tract to produce hypochlorous acid, a substance that helps suppress viral replication. For adults, a neti pot or squeeze bottle works well. Use distilled or previously boiled water mixed with a saline packet, and rinse three to four times a day until you feel better.
Choose the Right Decongestant
If your nose is completely blocked and you need relief, be aware that the most common oral decongestant on pharmacy shelves, phenylephrine, doesn’t actually work. A study testing doses up to four times the standard amount found it performed no better than a placebo at relieving nasal congestion. The FDA’s advisory panel voted unanimously that oral phenylephrine is ineffective, and many products still contain it as their only active ingredient.
Pseudoephedrine, sold behind the pharmacy counter (you’ll need to ask and show ID), is the oral decongestant that actually reduces nasal swelling. Nasal spray decongestants like oxymetazoline also work well for short-term relief, but limit use to three days to avoid rebound congestion, where your nose becomes more blocked than before once you stop.
Vitamin C and Elderberry: Modest but Real
Vitamin C won’t prevent a cold if you start taking it after symptoms appear, but regular supplementation does reduce the severity of colds by about 15%. Its biggest effect is on the worst symptoms: across five trials, vitamin C shortened the duration of severe cold symptoms by 26% while having no measurable impact on mild ones. If you’re already dealing with a bad cold, it’s worth adding, but don’t expect it to be a game-changer on its own.
Elderberry syrup has stronger evidence for shortening colds. In a placebo-controlled trial of air travelers, those taking elderberry had colds lasting an average of 4.75 days versus 6.88 days for the placebo group, roughly a two-day improvement. Their overall symptom scores were also about 40% lower. Elderberry is widely available as a syrup or gummy and is generally well tolerated.
What Not to Bother With
Antibiotics do nothing for a cold. Colds are caused by viruses, and antibiotics only kill bacteria. Taking them unnecessarily contributes to antibiotic resistance and can cause side effects like diarrhea.
For children under four, skip over-the-counter cough and cold medicines entirely. Manufacturers voluntarily label these products with warnings against use in young children because the risks, including serious side effects, outweigh any unproven benefit. The FDA also warns against homeopathic cough and cold products for this age group. For young kids, saline drops, honey (if over age one), fluids, and rest are safer and better supported by evidence.
Signs Your Cold Is Turning Into Something Else
A typical cold follows a predictable arc: symptoms peak around day two or three, then gradually improve. If your symptoms last more than ten days without getting better, or if you start improving and then suddenly get worse again with a higher fever and new pain, that pattern suggests a secondary bacterial infection like sinusitis, an ear infection, or pneumonia. Severe localized pain in your ear, throat, sinuses, or chest also warrants a call to your doctor, as does a stiff neck or a new rash accompanied by fever.