Medications that Weaken Your Immune System and Fungal Infections
Overall, most serious fungal infections are rare, but they do happen. They are most common among people with weak immune systems. People with certain health conditions may need to take medications with side effects that can weaken your immune system and put you at risk for fungal infections.
Specifically, corticosteroids and TNF (tumor necrosis factor) inhibitors are two types of medications that can increase your chances of getting a fungal infection.1
- Corticosteroids are medications that treat conditions including arthritis, asthma, allergic reactions, and autoimmune diseases such as lupus, sarcoidosis, orinflammatory bowel disease.
- TNF inhibitors are medications that treat autoimmune diseases such as rheumatoid arthritis, psoriasis, and inflammatory bowel disease.
Some fungal infections can be serious, such as:
- Coccidioidomycosis (Valley fever)2,3
- Cryptococcosis (neoformans and gattii)4-6
- Pneumocystis pneumonia (PCP)9,10
- Invasive Candida infection7
- Invasive aspergillosis7
What you need to know about fungal infections
Fungal infections can range from mild to life-threatening. Some fungal infections are mild skin rashes, but others can have serious complications. Because of this, it’s important for you to seek treatment as soon as possible to avoid serious infection.
Fungal infections can look like bacterial or viral infections. If you’re taking medicine to fight an infection and you aren’t getting better, ask your doctor about testing you for a fungal infection.
Where you live (geography) matters. Some disease-causing fungi are more common in certain parts of the world. If you live in or visit these areas and are taking medications that weaken the immune system, you’re more likely to get these infections than the general population. 7,8,12 For more information on travel-related illnesses, please see the CDC Traveler’s Health site.
The length of your treatment matters. Your healthcare provider can prescribe corticosteroids for short-term use (days to weeks) or long-term use (weeks to months). Long-term corticosteroid use is more likely to increase your chance of getting a fungal infection.
Amount of medication (dose). Higher doses of medications that weaken your immune system are more likely to increase your risk of getting a fungal infection.5,11,13,14
Click on the sections below to see lists of corticosteroids and TNF inhibitors that can increase the chances of getting a fungal infection.
Preventing fungal infections while taking corticosteroids or TNF inhibitors
Fungi are difficult to avoid because they are a natural part of the environment. Fungi live outdoors in soil, on plants, trees, and other vegetation. They are also on many indoor surfaces and on your skin. However, there may be some ways for you to lower your chances of getting a serious fungal infection.
Learn about fungal infections. There are different types of fungal infections. Learning about them can help you and your healthcare provider recognize the symptoms early, which may prevent serious illness.
Get additional medical care if necessary. Fungal infections often resemble other illnesses. Visiting your healthcare provider may help with faster diagnosis and may prevent serious illness.
Protect yourself from the environment. While using these medications, there may be some ways to lower your chances of getting a serious fungal infection by trying to avoid disease-causing fungi in the environment.15,16 It’s important to note that although these actions are recommended, they have not been proven to prevent fungal infections.
- Try to avoid areas with a lot of dust like construction or excavation sites.
- Stay inside during dust storms.
- Stay away from areas with bird and bat droppings. This includes places like chicken coops and caves.
- Wear gloves when handling materials such as soil, moss, or manure.
- Wear shoes, long pants, and a long-sleeved shirt when doing outdoor activities such as gardening, yard work, or visiting wooded areas.