Here’s an overview of why you don’t have as much focus and what you can do to cope:
Withdrawal sign or symptom
You have trouble concentrating
Why you’re feeling it
Your brain is used to getting a buzz (stimulation) from nicotine. Now it’s learning to stay alert without nicotine.
How long it lasts
A few weeks
What you can do
If you can, work a little less. Take lots of breaks.