The phrase "feel drowsy" is correct and usable in written English.
You can use it when describing a state of tiredness or sleepiness.
Example: "After a long day at work, I often feel drowsy by the time I get home."
Alternatives: "feel sleepy" or "feel tired."
Don't drive, if you feel drowsy, thanks to the natural feeling of the darkness taking over when you drive during the "daytime".
"Alcohol may make you feel drowsy, but it is a depressant, and after the initial drowsiness wears off, the nervous system rebounds and can be disruptive later on during the sleep cycle," explains LaRocca.
For example, body temperature usually rises during the day, correlating with alertness, and falls at night, when people start to feel drowsy.
Interestingly, the tendency to feel drowsy in the afternoon seems to develop naturally at puberty; 10-year-olds remain brightly alert all day.
As the food is digested, cells in your pancreas produce the hormone insulin, which in turn leads to an increase in melatonin and serotonin, hormones that makes you feel drowsy as well as happy.
"I would sleep for 40 minutes, wake up and even if I took sleeping pills – I was taking Nytol, prescription stuff – it would make me have nightmares or feel drowsy.
This includes substances that make you feel more awake (caffeine and sugar) as well as those that make you feel drowsier (alcohol).
It did not look at the quality of people's sleep or whether they felt drowsy all day.
But for years, the Food and Drug Administration has gotten complaints that people felt drowsy the morning after taking the medicine or its successors, and sometimes got into car accidents.
Considering different road types, drivers felt drowsy more quickly on freeways compared to other facilities.
I felt drowsy from the fire and the dope.
