The ability of someone taking anti-depressant medication to buy a gun depends on the laws and regulations of the specific country and state (if applicable) they are in.
In the United States, for example, the process of buying a gun involves a background check, which includes a review of an individual's mental health history. Federal law prohibits certain individuals from purchasing firearms, and this includes individuals who have been involuntarily committed to a mental institution or have been adjudicated as mentally ill. Additionally, if someone has been convicted of a crime that could result in more than one year in prison, they are also generally prohibited from purchasing firearms.
Taking anti-depressant medication alone does not necessarily disqualify someone from buying a gun. However, if the individual's mental health condition is severe enough to have resulted in involuntary commitment or adjudication as mentally ill, or if they have a criminal record that includes certain offenses, they may be prohibited from purchasing a gun.
It's crucial for anyone considering purchasing a firearm to familiarize themselves with the specific laws and regulations in their area, and if they have any concerns, they should seek legal advice or consult with a qualified professional. Additionally, it's essential to prioritize safety and consider whether owning a firearm is appropriate given one's mental health condition.