"only administered" is correct and usable in written English.
You can use it to limit or restrict the scope of something. For example: "This medicine should only be administered by a doctor."
But much government aid to nonprofits is allocated by the state and only administered by the county.
The extension supporters said there was no loss of home rule because the commission, whose voting members include town supervisors, only administered plans written and adopted by the towns themselves for areas of the preserve within their borders.
He not only administered the research projects but also financed two additions to the laboratory buildings primarily from students' fees, with little support from the university and colleges.
Subsequent phases were only administered to those who had not responded to earlier phases.
Neuromuscular blocking agents were only administered during tracheal intubation maneuvers, as necessary.
According to current guidelines, cisatracurium was only administered in case of shivering [18].
Epinephrine was only administered in one instance when it was introduced prior to admission in ICU.
For physicians and nurses, all measured activities were only administered in direct contact with the patient.
However, due to the narrow therapeutic window and considerable side effects associated with systemic dosing, Prialt is only administered intrathecally.
One group received an injection of corticosteroid and manipulation; the other was only administered manipulation during anesthesia.
Thirdly, the loneliness measure was only administered to half of the sample (n = 149), reducing power for this variable.
