Final answer:
Toluene and sulfuric acid are not commonly used in the pharmaceutical industry due to safety concerns, environmental impact, and cost. Other chemicals may be more efficient and yield better results in drug synthesis reactions.
Step-by-step explanation:
In the pharmaceutical industry, toluene and sulfuric acid are not commonly used for several reasons. Firstly, there are safety concerns associated with handling these chemicals, as they can be toxic and pose a risk to workers. Secondly, both toluene and sulfuric acid have negative environmental impacts, especially when not properly handled and disposed of. Lastly, these chemicals can be costly to obtain and use in production processes. Additionally, there may be other chemicals that are more efficient and yield better results in drug synthesis reactions.