"It appears to have few negative consequences..."
I invoke the law of unintended consequences. A fine example would be "so sorry it killed test subject 1337, apparently that particular genetic mutation in his DNA looked like a disease."
I invoke the law of unintended consequences. A fine example would be "so sorry it killed test subject 1337, apparently that particular genetic mutation in his DNA looked like a disease."
But let's suppose that you can't measure in advance the number of cells that are infected, nor can the drug actually tell the difference between infected and not-infected cells (due to the aforementioned genetic abnormality.) What happens when the drug kills too many normal cells? The human dies.
Still it would likely be a staged treatment that wouldn't kill the entirety of infected cells in a single dosage. The benefit is that you could see if there were adverse reacts before continuing.
Radiation is targeted and not administered 'generally' like a drug would be. If you could aim drugs, chemotherapy would likely change drastically.