The phrase "lethargic state" is correct and usable in written English.
You can use it to describe a person's behavior when they are feeling listless, tired, or lacking energy. For example, "I was in a lethargic state and could hardly keep my eyes open after working a double shift."
The drop in body temperature, if the ambient temperature is relatively low, results in a lethargic state.
Many mammals hibernate, which is a profound lethargic state of several weeks or months during winter, that represents a transitory episode of hetherothermy.
As Odile, Zenaida Yanowsky, a tall, blond dancer of lyrical allure, risked falling into a lethargic state here, although her technique carried her through all the standard single fouettés.
Don't mistake calm for a tranquil or even lethargic state.
Other than kidney failure, dogs can also develop vomiting or diarrhea as well as a lethargic state.
Watching him in the hospital, I feared that he wouldn't make it, and I felt myself internally slipping back into a lethargic state.
Lethargic state-owned banks control over 90% of India's banking assets.
What Redstone failed to mention while taking cheap swipes at Cruise was the still-lethargic state of the movie business and Paramount's own troubles.
Patients that exhibited signs of severe malaria such as not being able to drink or breast feed, repeated vomiting, convulsions, lethargic or unconscious state, unable to sit or stand up.
The activists said they took matters into their own hands because of state leaders' lethargic response and apparent reluctance to deal with the issue.
MEXICO CITY — Mexican President Enrique Peña Nieto proposed historic changes to this nation's state-run energy sector Monday, cracking open the door for global oil giants such as Exxon Mobil and Shell to invest in Mexico's lethargic 75-year-old state oil monopoly, Pemex, the eighth-largest oil company in the world and a symbol of deep nationalist pride.
