Boots customers are facing a wait of more than an hour to get on to its website, with more than 120,000 in a queue.
Shoppers are being greeted with a message that states ‘hello, you’re in a virtual queue’, and that it is limiting the amount of people shopping the website to help ensure everyone gets what they need.
Customers are being advised not to close the website page while they wait for their turn to be able to shop.
However, people can still click onto its repeat prescription delivery service.
A spokesperson for Boots said: "Boots.com is currently seeing very, very high demand so to make sure we can continue to take orders for essential healthcare and toiletry products we have temporarily introduced a queuing system onto the site for customers.
"We are prioritising the processing and shipping of essential items on Boots.com and so we are also limiting sales on our site of some products. We are doing everything possible to manage essential deliveries to our customers and we thank them for their patience, and all our warehouse colleagues for their support at this time.
"We are not planning for this to be a long term issue and believe that we should return to a more normal place as soon as possible."
This week Boots announced it has supported the government's plan to test NHS workers showing coronavirus symptoms after launching free drive-through centres.
The company opened facilities at its headquarters in Nottingham and at Chessington World of Adventures in Surrey to support the government's bid to test doctors and nurses who have been self-isolating and are unsure whether they have the virus.
Boots said locations for more test centres are still being defined around the country, but they will not be in its stores.
The sites will initially be for NHS staff by invitation only, the company said.Richard Bradley, pharmacy director for Boots UK, said: "We are here today at the home of Boots in Beeston, Nottingham, to open a testing site for Covid-19 to be able to test NHS workers completely free of charge so that they can return to work to support their colleagues on the front line.
"In the first instance, the tests are for the NHS workers who are isolating themselves, unsure if they have Covid-19 or not."
