I feel that, for adding more coatings to test, it becomes a balancing act between finding an ideal antibiotic and the increased time and resources of a larger study. In these situations I think it’s important to properly research beforehand on established coating and protocols to minimize the chance that any mishaps were due to factors that are not being examined by the lab test. For the example given in class, the two drugs are established as being safe for use in humans, so there is very little chance that the drugs themselves would pose a risk to humans. If by some chance the adverse stress effects were due to the drug itself in the rats, there is still very little reason to rule out its use in humans if there is no published evidence that these drugs have had similar results in human testing. The purpose of the test was to examine the antibiotic effectiveness of the coatings since they were already deemed safe for use.