Can't answer your specific question, I guess the CAA may take each case on it's merits or maybe a complete ban??
Here's a list of
possible adverse effects.....
Side-effects
gastro-intestinal disturbances, appetite changes, dry mouth, taste disturbance; headache, drowsiness, dizziness, sleep disorders, abnormal dreams; less commonly thirst, weight gain, aphthous stomatitis, gingival pain, chest pain, hypertension, tachycardia, atrial fibrillation, palpitation, panic attack, abnormal thinking, mood swings, dysarthria, asthenia, tremor, incoordination, hypertonia, restlessness, hypoaesthesia, impaired temperature regulation, menorrhagia, vaginal discharge, sexual dysfunction, dysuria, arthralgia, muscle spasm, visual disturbances, eye pain, lacrimation, tinnitus, acne, sweating, rash, and pruritus; myocardial infarction, depression, and suicidal ideation also reported
(from the e-
BNF)
I would have thought the possibility of the drug exascebating underlying depression would make it a no-no.
In my experience the key issue in smoking cessation, is acting whilst the patient is keen. The agent used to manage cravings, is of less importance.