How often should Selegiline patches be applied?

Selegiline patches, specifically the transdermal delivery system, are designed to be applied daily to ensure consistent and effective delivery of the medication to manage symptoms of depression. This formulation allows for a steady release of selegiline, helping to maintain stable levels of the drug in the bloodstream, which is critical for its therapeutic action. The daily application is also convenient and less likely to lead to missed doses compared to longer intervals, thereby optimizing the medication's effectiveness in alleviating depressive symptoms.

In contrast, the other options suggest less frequent application, which would not provide the necessary continuous therapeutic levels of the medication and could lead to fluctuations in symptom control.