The phrase "advised to use only" is correct and usable in written English.
It can be used when giving recommendations or instructions regarding the exclusive use of a particular item or method.
Example: "Patients are advised to use only the prescribed medication to ensure their safety and recovery."
Alternatives: "recommended to use solely" or "instructed to use exclusively".
You are advised to use only qualified acupuncturists - go to www.acupuncture.org.uk or call 020-8735 0400.
Participants are advised to use only soft, feather-free pillows to swing lightly at one another, avoiding those without pillows or with cameras and to remove eyeglasses or sunglasses before combat.
Families were given stainless steel water bottles and lunch boxes and advised to use only the containers provided.
Participants were advised to use only their first names in the conversation to help protect their privacy.
Among the remaining 49, 10 % were advised not to take multivitamins and/or supplements, 7 % were advised to use only multivitamins, and 32%% received recommendations to use multivitamins and/or supplements.
Furthermore, we could not assess or control for the providers' oral explanations of breast cancer risk that could potentially have contributed to allocation bias, but providers were advised to use only the format or formats of communicating risk assigned to them for this study.
People in Durham were advised to use the capability only when phoning 911 is not possible, and not to send emergency texts from outside Durham County, lest their messages be received by an unprepared dispatch center.
It is advised to use greasy water only together with the other lawn-based co-substrates up to a share of one third.
Mercury was a treatment of last resort, however, as the rules of the Blatterhaus made clear: medical practitioners were advised to use this dangerous "acid cure" treatment only with moderation, and only after every other remedy had been tried.
