In drug compatibility, what does "chemical incompatibility" often result in?

Chemical incompatibility occurs when two or more substances react with one another in a way that alters their original properties. This type of incompatibility often results in the formation of toxic by-products. These by-products can be harmful to the patient and can lead to adverse effects if the mixture is administered.

For instance, two drugs that are supposed to work synergistically might instead react to create a compound that is not only ineffective but also potentially harmful. It's essential for healthcare professionals to understand these interactions to ensure patient safety, as recognizing chemical incompatibilities can prevent serious medication errors.

The other options do not represent the consequences of chemical incompatibility. A mix of two effective medications often represents a beneficial combination rather than an incompatible reaction. Increased viscosity of the solution and increased effectiveness of drugs would typically not result from a reaction that indicates chemical incompatibility, as these conditions are more related to physical properties or desirable interactions between compatible drugs.