The phrase "administered by her" is correct and usable in written English.
It can be used in contexts where you want to indicate that someone is managing or overseeing a particular task or responsibility.
Example: "The medication was administered by her according to the doctor's instructions."
Alternatives: "managed by her" or "overseen by her".
Ephron's sister Amy described in a novel the circumstance of their mother's death, from cirrhosis, aided by sleeping pills administered by her father.
Her regimen of medications requires five pills in the morning, a nasal spray once a day and three more pills in the evening, along with a shot administered by her husband or one of her sons.
Nestled among the party faithful, May fell back on a souped-up populist tidbit, apparently with the sole intention of poking fun at a system administered by her own department.
Extending a Life Mercedes Perazzo, 87, a former ambulance technician for New York City whose life force now waxes and wanes because of congestive heart failure and diabetes, attributes her longevity to the care administered by her hospice team for the last 16 months.
Recently, however, Mrs. Minnie Kenndy announced that in spite of the great pain she was suffering from a biff on the nose administered by her daughter, Aimee Semple McPherson, she would go right on with plans to dedicate a new church.
It would be a cruel irony if Irom's mental or physical health deterioriated after a 16-year force-feeding regimen, thanks to a new regimen of isolation administered by her old allies.
The Senior Citizen Audit Program was administered by his office.
Instead, it looks set to be administered by historian Maria Schmidt and her House of Terror museum.
From the Order of Canada grew a larger Canadian honours system, thereby reducing the use of British honours (i.e. those administered by the Queen in her British privy council).
The treatment was administered by one therapist only, making her personality vital concerning interaction with the informants.
She was in her cabin drinking a medicinal gimlet mixed and administered by Miss Skattergoods.
