Common side effects include all of the following EXCEPT:

The choice of sneezing as the exception among the common side effects is valid because sneezing is typically not associated with the side effects of medications. Common side effects such as nausea, drowsiness, and headache are frequently reported in various medications, especially those affecting the central nervous system or gastrointestinal tract. Nausea is a common response to many drugs, particularly pain relievers and antibiotics. Drowsiness is frequently observed with sedatives, antihistamines, and certain antidepressants. Headaches can be a side effect of a range of medications as well, often due to changes in blood pressure or chemical balances in the brain.

In contrast, sneezing generally pertains to respiratory reactions, such as allergies or irritants, rather than being a side effect of medication. Therefore, it stands out as an option that does not align with the typical side effects seen in drug administration, making it the correct answer in this context.