Drug-induced pulmonary disease is any lung disease that is directly caused by a drug or medication.
Certain medications can cause lung disease as an unwanted side effect. Problems can range from mild to severe. They may include a dry irritating cough, excess fluid in the lungs known as pulmonary edema, asthma attacks and other conditions. Drug-induced lung disease is usually, but not always, reversible.
Symptoms depend on the type of lung disease brought on by the medication. They may include: coughasthma attack. This entails wheezing, coughing and tightness in the chest.difficulty breathing, or shortness of breathshortness of breath brought on by only minimal exertion
Several drugs have the potential to cause lung disease as a side effect. Some common ones include: some types of blood pressure medicationsnon-steroidal anti-inflammatory medicationssome types of antibioticscertain chemotherapy medications, used to treat cancer or suppress the immune systemheroin, cocaine and other illegal drugssome types of heart medications (ie. Amiodarone)
This type of reaction to a medication is rarely predictable. Therefore, the initial episode of the lung disease often cannot be avoided. Once a person knows that a drug causes this reaction, the drug should be avoided if possible.
Chemotherapy medications such as bleomycin, carmustine and busulfan can cause lung disease when the total dosage the person has received accumulates to a high level. To avoid this problem, the healthcare professional must keep track of the total amount of the medication the individual has received.
Often the diagnosis is obvious to the healthcare professional from the history of drugs or medications and from the physical exam. If not, chest x-rays and other tests may be needed to determine the exact nature of the lung problem.
The professional must then determine whether the medication caused the lung disease. The person may need to stop the medication to see if the lung problem goes away. Rarely, a lung biopsy is required. This procedure involves removing a small piece tissue from the lung with a needle. The sample is then examined in the lab.
The lung disease will often disappear and the lungs return to normal when the medication is discontinued. If this is the case, there will be no long term effects. Occasionally, there may be scarring and permanent damage to the lungs. In the case of a severe allergic reaction or asthma attack, death may result.
There are no risks to others.
The condition is usually treated by discontinuing the drug that has caused the respiratory problem. In some cases, the person must continue to take the medication because of another medical condition. In other cases, irreversible lung damage may have occurred before the medication was stopped. These situations may require treatment with oxygen or other medications. Lung problems caused by an allergic reaction can be helped with corticosteroid drugs such as oral prednisone.
If a drug has to be discontinued because of respiratory problems, the condition it was prescribed to treat may worsen or return. Other medications used to treat lung disease may result in side effects such as allergic reactions or stomach upset.
Lung disease may go away after the medication is stopped. If this is the case, no further treatment is necessary. If irreversible lung damage has occurred, lifelong treatment may be needed.
The condition is monitored with breathing tests, known as pulmonary function tests, and by following a person's symptoms.
Harrison's Principles of Internal Medicine, 1998, Fauci et al.