Full Hearing. Dr. Ruben explains that kittens should fully hear and start responding to sounds, as well as sights, around 25 days after birth. At this point you might notice that baby Rascal perks up his ears when you mimic his high-pitch meowing noise or turns his head when his littermates start crying.
Anticholinergics are a class of drugs that block the action of the neurotransmitter acetylcholine in the brain. They are used to treat diseases like asthma, incontinence, gastrointestinal cramps, and muscular spasms.
How they can cause fatigue: Antipsychotics are drugs that dull the activity of the central nervous system. In studies, the side effects include fatigue, lethargy and weakness. Many of these drugs also lower dopamine levels, which can lead to drowsiness and sleepiness as well.