In a submission to a House of Representatives inquiry into allergies and anaphylaxis, doctors Nick Cooling, Malcolm Turner, Troy Wanandy and registered nurse Jenny Gudden said Tasmania was the only state without such a service.

They said there were long waiting times, often lasting months to years, for access to both public and private allergy services in the state.

"There are also large gaps in services including lack of food challenge clinics in regional areas, no dedicated drug allergy clinics, no inpatient allergy or immunology specialty services in the major hospitals and minimal public adult allergy and immunology clinics," the group said.

They said modernisation and co-ordination of allergy and immunology services would be a low-cost, high-impact initiative which could use pre-existing resources such as the Jack Jumper Allergy Program.

"Currently, there are a range of allergy and immunology services scattered across Tasmania, but these are disconnected and piecemeal," the group said.

"A statewide allergy and immunology service in Tasmania would avoid duplication and waste of resources, enable care to be provided in the right setting by the right provider, and foster collaboration, education and integration with primary care providers."

Launceston dermatologist Michael Sladden has written to the House of Representatives committee to ask why an injection to treat severe atopic eczema was rejected for inclusion on the Pharmaceutical Benefits Scheme.

He said Duprixent was considered to be somewhat of a miraculous drug for some patients.

"Duprixent is the first of a new class of drug for eczema and many of my paitents are desperate for better treatment for their severe skin condition which causes pain, itch, infection and has a huge negative impact on quality of life," Associate Professor Sladden said.

The committee has received 250 submissions from around the country to the inquiry which was instigated by Health Minister Greg Hunt in August.

Hearings will recommence in February.