Which of the following is a common route for inhaled medications?

Inhaled medications are typically delivered through the respiratory system, which means they are taken in via the airways for quick absorption and effect, especially in conditions affecting the lungs, such as asthma and chronic obstructive pulmonary disease (COPD). Nasal sprays involve direct application to the nasal passages, which can lead to some systemic absorption, but they primarily serve the nasal cavity rather than the lungs.

Choosing nasal sprays as a common route sources from the understanding that they are often designed to deliver medication that can also reach the lungs effectively. However, compared to inhalers and nebulizers, nasal sprays are not the primary means for directly inhaling medications meant for targeting lower respiratory conditions. Nevertheless, options like liquid drops and oral tablets do not administer medication through the respiratory system, as they are ingested or applied topically, and transdermal patches deliver substances through the skin rather than the lungs. Thus, given the context of inhaled therapies, nasal sprays are the most fitting choice provided, reflecting a route that directly impacts respiratory function.