GP's have no place in prescribing any medication related to mood. They are not trained sufficiently in human behaviour or how to recognise the many mood disorders humans present with. Nearly 30 years ago, I went to a GP who had a good reputation for helping with depression. After one 15 min consultation, I commenced taking the antidepressant, Prozac. After about two weeks passed, my moods began to really plummet and I was feeling very low. I made an appointment and he told me to double my dose and everything will be ok. I doubled the dose and 5 days later I was suicidal. So many people have the same stories and many are much worse than mine. Since that time, there has been some different products on the market that work in a different way, avoiding that 'dip' in mood associated with starting these types of drugs. This article describes them.
https://www.verywellmind.com/snris-and-ssnris-380183