“It was the norm for me to be in and out of hospital all the time,” Mr Main told BBC News NI.
“I sort of put it to the back of my mind and at that point I was only using the medication to function to get through my day.”
He said he suffered from, “loss of weight, loss of appetite, no real drive and no real up and go”.
Mr Main admitted he kept what was happening a secret from most people in his life.
“I split up with my partner, she was the only one that really knew at the time, she tried to help as much as she could”.
His addiction also affected his career, “I maybe missed work for a month or two, I would take a lot of days of sick so I would”.