Patient Teaching for Metformin XR

In this pharmacology question, we need to identify the correct instruction for a client taking Metformin XR for type two diabetes mellitus.

Let's focus on the key details: the medication is Metformin, and specifically, the XR version, which stands for extended release.

Let's evaluate the options one by one. The second option suggests crushing or chewing the medication. This is a major red flag.

Because this is an extended-release formulation, labeled as X R, crushing or chewing it would destroy the timing mechanism, leading to rapid absorption and potential toxicity. So, we can eliminate this option.

The third option mentions an increase in perspiration. While Metformin can cause side effects, increased sweating is not a common or characteristic side effect associated with its primary mechanism.