A man armed with a large knife robbed a pharmacy in Dunmurry on Saturday.
Shortly after 5pm the man entered the pharmacy on Kingsway and threatened staff.
He demanded they hand over money and drugs.
He made off with a sum of cash and a number of boxes of Diazepam tablets.
The robber is described as being around 5’11’’ tall, of slim build and wearing a cream coloured coat, grey track bottoms and a green scarf. He was also wearing gloves.
Although staff were not injured, they were left very badly shaken after the incident.
Detective Constable Fiona Mawhinney said: “”Diazepam is an extremely potent drug that should only be taken if prescribed by a physician.
“It can be extremely dangerous and even fatal in the wrong hands.
“Those who take such drugs when they have not been prescribed them are playing Russian roulette with their lives.”
Anyone with information regarding the incident is asked to contact police at Lisburn on the non-emergency number 101.