Final answer:
Clonidine typically causes side effects like bradycardia, sedation, rebound hypertension, and dry mouth but not apnoea. It is used to treat various conditions, including hypertension, anxiety, pain, and ADHD.
Step-by-step explanation:
Clonidine is known to cause various side effects, but one effect that it does not typically cause is apnoea. The medication, a sympatholytic drug, acts as an α-agonist which can lead to side effects such as bradycardia, sedation, rebound hypertension, and dry mouth. Clonidine is used in the treatment of conditions besides hypertension and anxiety, which includes certain pain conditions and attention deficit hyperactivity disorder (ADHD).
However, it does not typically cause apnea. Apnea refers to the temporary cessation of breathing, and while clonidine can affect respiratory function, it is unlikely to cause complete cessation of breathing. Therefore, the correct answer is B. Apnea.