Dexter Elliott was last seen leaving his home in Worksop at about 4pm on Thursday 12th December.
An unconfirmed sighting placed the 41-year-old in the area of Swinton Street, close to King’s Cross Train Station, in London on Friday 13th December. Later that day there was a reported sighting a few miles south in the Clerkenwell area.
Dexter is white, about 5ft 5ins tall and of medium build. He has shaven dark hair, brown eyes and has a Yorkshire accent.
He was wearing a dark woolly hat, jeans, a black jacket and trainers.
Insp Phil Davies said: “We are growing increasingly concerned for Dexter’s welfare as he has now gone nearly a week without his medication. If you have seen him, or know where he is, please call us.”
If you have any information contact Notts Police or call Crimestoppers anonymously.