Panic buying is stripping the shelves of supermarkets and pharmacies with new drastic measures brought in to meet demands.

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An Adelaide man has reportedly hoarded more than 5400 toilet rolls after panic buying left supermarket shelves stripped.

An anonymous grocer told 9 News Adelaide they had been approached by the man, who has allegedly been contacting independent stores about his stash after being banned from online selling.

It comes as many shoppers continue to struggle to get their hands on the precious paper despite assurances from the big supermarkets that stock levels are returning to normal.

Shelves were emptied of toilet paper last month due to fears the coronavirus pandemic could lead to shortages, forcing Coles, Aldi and Woolworths to introduce limits of one pack per customer.

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In an email to customers last week Woolworths’ CEO Brad Banducci revealed the supermarket giant had sold 20.5 million rolls of toilet paper in one week.

However things were “slowly improving” and he urged customers to only buy what they need.

“Amazing as it might seem, we are still seeing almost double our normal demand for toilet paper. Just this week, that was over 20.5 million rolls,” Mr Banducci said.

“So despite much more stock coming in, we’re still not where we need to be. It is slowly improving, but please help everyone by only buying what you need.”

Online marketplaces such as eBay have acted quickly to prevent sellers from taking advantage of the toilet paper shortage.

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After shortages in stores, listings for toilet paper at exorbitant prices began appearing online.

In reponse late last month eBay restricted the sale of face masks, hand sanitister, toilet paper, and baby forumla to “select business sellers”, a spokeswoman told news.com.au.

“We love that people can buy anything on eBay in times of need but eBay does not allow sellers to list items at a price higher than is considered fair or reasonable,” they said.

“This includes price gouging essentials in response to an emergency or disaster. This behaviour is un-Australian and will not be tolerated.”

Gumtree has temporarily banned the selling of masks, hand sanitiser, disinfecting wipes and toilet paper to prevent price gouging.

Facebook has also banned the sale of hand sanitiser, wipes, and coronavirus test kits.

Meanwhile, Home Affairs Minister Peter Dutton has vowed to crack down on “supermarket gangs” who take advantage of the toilet paper shortage.

“I think they're sending some of the product overseas or selling it in a black market arrangement,” he said.

Late last month police arrested a man accused of stealing toilet paper from supermarkets in Sydney's southwest suburbs.

Police say two men allegedly stole multiple packs of loo roll from Granville and Auburn stores, where one of the men allegedly threatened an employee with a knife.