WA denies meth help line 'dob in' rumour

Western Australia's mental health minister has moved to quell concerns about the confidentiality of a helpline for methylamphetamine users.

Andrea Mitchell said a radio report suggesting callers were being asked to "name their dealer" were incorrect.

"Let me assure you that is not the case. This is a confidential service," she told reporters on Sunday.

"They're counsellors - they're not police and detectives."

Ms Mitchell said 160 people, mainly users, called the line in its first week of operation.