If the origins of any suspicious densities on the lungs fall into a category that is treatable with a medication, patients should be able to exhale with a sigh of relief as that rules out the possibility of a lesion of lung cancer or that a patient is suffering from a disease that points to signs of asbestos or silicosis. Signs of a lung infection can range from things like shortness of breath, a chronic dry cough and flu-like symptoms . The microbe that is causing the infection can fall into three main categories and the treatment that you will need to use is highly dependent on what that is. Doctors must treat a bacteria, viral or fungal infection differently in order to make sure the microbe is destroyed. Here, we will cover some of the drugs to treat suspicious lung densities that you may need to take and what side effects could be possible.
Drugs for a Bacteria Infection
The drugs that you will take in this category can be more specific depending on the type of microbe you are identified as having. Generally, doctors suspecting a bacterial infection will give you a course of antibiotics to see if there is any improvement in your condition. Chances are, the first thing that you will have offered to you will be Amoxicillin . This is the first-line therapy for any type of bronchitis or pneumonia infection. It is common to give this medication nowadays with a combination of clavulanic acid . This will help keep the medication effective against potential transformations from the bacteria. The side effects from this are relatively mild and could just include stomach pains and nausea.
If the doctor determines that you are suffering from a more advanced bacterial infection and the diagnosis points to signs of tuberculosis, Amoxicillin will not get the job done and you will need to go on RIPE therapy. This is an acronym that stands for the names of the medications involved in the treatment. Rifampin, Isoniazid, Pyrazinamide, and Ethambutol are these medications and each is needed to destroy a specific portion of the lifecycle of Mycobacterium tuberculosis, the bacteria responsible for tuberculosis.  They do come with a panel of side effects that can make tolerating this medication a difficulty for many patients. Rifampin is capable of changing the color of your urine to reddish-orange which can be concerning for patients. Ethambutol can cause you to have a change in your color perception in your eyes and Isoniazid is capable of causing shooting nerve pain. These medications are the best available option for fighting TB and patients must be on this therapy for at least 6 to 9 months in order to ensure that the bacteria has been fully eradicated. If you experience side effects from this drugs, notify your doctor so he will be able to augment your doses and may even switch out a medication to a less effective one but with fewer side effects. 
Drugs for a Fungal Infection
When it comes to a fungal infection, your choices for medications are also quite diverse. This will be a necessary treatment when you have signs of Histoplasmosis, Blastomycosis or Coccidioidomycosis that is more spread out in the body and not responding to a normal course of antibiotics. Itraconazole, ketoconazole, and amphotericin B are the principal agents in this category of drugs to treat suspicious densities on the lungs. They are effective by changing the way fungi are able to process cholesterol in their DNA causing the cells to eventually die. This is a category of medication that comes with numerous side effects as well. Patients taking these drugs may experience rashes, itchiness, nausea, vomiting and stomach pains. When attempting to get over a fungal infection, the length of treatment will also be prolonged so it can be annoying for patients to consistently remember to take their medications. 
Drugs for Viral Infections
The last category of treatment for patients suffering from suspicious densities on the lungs due to a viral origin will be the last category I cover. As with any viral infection, all therapies are not always appropriate for these infections. Patients suffering from viral infections will have no benefit whatsoever from taking a course of antibiotic therapy so it is best to avoid them.
What patients can benefit from would be a course of antiviral therapy like oseltamivir for their infection. It is a drug that is only effective in the first 48 hours of a viral infection and has been proven to hasten the recovery if given early on in the viral infection. It is a medication that is able to reduce the amount of viral DNA that is produced in the early stages of an infection so patients will not have to launch a prolonged immune response in order to fight the infection. If you take the medications after the first 48 hours, however, studies show there is no difference compared to a control meaning the drug will not help you.