Adenovirus infections are treated with supportive care, not antiviral medications. There is no prescription drug approved for the general public that kills adenovirus, so treatment focuses on managing symptoms while your immune system clears the infection. Most people recover within 3 to 5 days for respiratory symptoms, though stomach-related infections can take longer.
Managing Fever, Pain, and Fatigue
The foundation of adenovirus treatment is simple: rest, fluids, and over-the-counter pain relievers. Anti-inflammatory medications like ibuprofen or acetaminophen help control fever and ease sore throat or body aches. Bed rest for a few days gives your body the energy it needs to fight the virus. There’s no benefit to pushing through symptoms early, and doing so can prolong your recovery.
Antibiotics will not help. Adenovirus is a virus, not a bacterium, and prescribing antibiotics for viral infections is both ineffective and contributes to antibiotic resistance. If your doctor suspects a secondary bacterial infection on top of the virus, that’s a different situation, but the adenovirus itself won’t respond to antibiotics.
Treating Respiratory Symptoms
Adenovirus commonly causes cold-like illness: runny nose, cough, sore throat, and fever that typically lasts 3 to 5 days. A humidifier can loosen congestion and make breathing more comfortable. Saline nasal sprays help clear mucus without medication. For sore throat, warm salt water gargles, ice chips, or throat lozenges provide relief.
Over-the-counter decongestants and cough suppressants can help you sleep and function, but they won’t shorten the illness. If you’re caring for a young child, check age restrictions on these products carefully, as many are not recommended for children under four.
Handling Adenoviral Pink Eye
Adenovirus is one of the most common causes of viral conjunctivitis (pink eye). The eyes become red, watery, and irritated, sometimes with a gritty feeling. Artificial tears or lubricating eye drops can soothe the discomfort. Cool compresses applied to closed eyelids also help.
The American Academy of Ophthalmology recommends against using antibiotic eye drops or steroid eye drops for viral conjunctivitis. Antibiotic drops won’t work against a virus, and steroids can sometimes make things worse. Adenoviral pink eye is highly contagious, so avoid touching your eyes, wash your hands frequently, and don’t share towels or pillowcases. The infection typically clears on its own within one to two weeks, though some cases linger longer.
Rehydration for Stomach Symptoms
Some adenovirus strains cause gastroenteritis: vomiting, diarrhea, and stomach cramps. Dehydration is the main risk here, especially in young children. Oral rehydration solutions (sold as Pedialyte or similar products) replace both water and electrolytes more effectively than plain water.
If vomiting makes it hard to keep fluids down, start small. Offer a teaspoon (about 5 mL) at a time using a syringe or spoon, then gradually increase the amount as tolerated. For children with mild to moderate dehydration, the goal is roughly 50 to 100 mL of oral rehydration solution per kilogram of body weight over 2 to 4 hours. For mild cases, give 2 to 4 ounces of rehydration solution after each episode of vomiting or watery stool.
Return to normal eating as soon as possible. The old advice about starving a stomach bug or sticking to the BRAT diet is outdated. CDC guidelines recommend returning to an age-appropriate, unrestricted diet quickly after rehydration, including complex carbohydrates, meats, yogurt, fruits, and vegetables. Breastfeeding should continue throughout, even during the rehydration phase. Formula-fed babies can go right back to full-strength formula. The one thing to avoid is large amounts of sugary drinks, juice, soda, or gelatin desserts, as the sugar can worsen diarrhea.
Preventing Spread at Home
Adenovirus is a non-enveloped virus, which makes it tougher to kill on surfaces than many other viruses. Standard hand sanitizers and some common household cleaners may not be enough. The CDC recommends using an EPA-registered disinfectant effective against adenovirus. A bleach-based solution works well: mix 10 to 25 tablespoons of bleach per gallon of water, apply it to surfaces, and let it sit for at least one minute before wiping.
One important detail: 70% isopropyl alcohol (the most common rubbing alcohol) is not effective against adenovirus. Ethyl alcohol at 70% does work on hard surfaces like medical instruments, but for general household cleaning, bleach-based solutions are your best option. Products registered on the EPA’s List G, which covers disinfectants effective against norovirus, also work against adenovirus. You can search this list on the EPA website to check if a specific product qualifies.
Beyond disinfecting, basic hygiene goes a long way. Wash hands thoroughly with soap and water (more effective than hand sanitizer for non-enveloped viruses). Keep the sick person’s towels, cups, and utensils separate. If they have pink eye, change pillowcases daily.
Treatment for High-Risk Patients
For most healthy people, adenovirus is unpleasant but not dangerous. The picture changes for people with weakened immune systems, particularly organ transplant or bone marrow transplant recipients. In these patients, adenovirus can spread beyond its usual targets and cause severe, organ-threatening illness.
Treatment in this group still starts with supportive care, but doctors may also reduce immunosuppressive medications to let the immune system fight the virus more effectively. For serious cases with organ involvement or widespread infection, an antiviral called cidofovir is sometimes used. This drug carries significant side effects, including kidney damage and bone marrow suppression, and its benefit in transplant patients remains uncertain. Treatment decisions in this population are highly individualized and vary between transplant centers.
Vaccine Availability
An adenovirus vaccine exists, but it is only available to U.S. military personnel. It covers adenovirus types 4 and 7, which cause outbreaks in the close quarters of military training. The vaccine is approved for service members ages 17 through 50 and is primarily given to recruits entering basic training. There is currently no adenovirus vaccine available to the general public.
Signs That Need Medical Attention
Most adenovirus infections resolve on their own within a week. You should seek care if symptoms worsen after the first few days instead of improving, if a fever persists beyond five days, or if you notice signs of dehydration: no tears when crying (in children), very dark urine, dizziness, or going many hours without urinating. Difficulty breathing, chest pain, or persistent high fever in a young infant all warrant prompt evaluation. People who are immunocompromised should contact their care team at the first sign of adenovirus symptoms, since early intervention makes a meaningful difference in outcomes.