Which medication is appropriate for controlling withdrawal symptoms in a long-term smoker?

Zyban is the correct medication for controlling withdrawal symptoms in a long-term smoker. It is an antidepressant that is specifically approved for smoking cessation. Zyban, which contains bupropion, works by influencing the neurotransmitters in the brain that are involved in nicotine addiction. By helping to reduce cravings and withdrawal symptoms associated with terminating tobacco use, it supports individuals in their effort to quit smoking.

This medication not only assists in managing the psychological aspects of nicotine withdrawal but also helps in reducing the urge to smoke. Its formulation and therapeutic effects target the underlying issues associated with addiction, making it a valuable tool for those looking to quit smoking.

The other options are not suitable for this purpose. Ativan, a benzodiazepine, is primarily used to manage anxiety and certain seizure disorders and is not effective in treating nicotine withdrawal. Lopressor, a beta-blocker, is used to treat cardiovascular issues and has no role in smoking cessation. Romazicon is an antidote for benzodiazepine overdose and does not apply to nicotine withdrawal at all. Therefore, Zyban is specifically designed to assist smokers through the cessation process, making it the most appropriate choice for managing withdrawal symptoms in long-term smokers.