Regular caffeine users may suffer from withdrawal symptoms if caffeine consumption is suddenly stopped.

Withdrawal symptoms generally begin 12-24 hours after stopping caffeine. The symptoms of withdrawal usually peak at 20-48 hours. Most symptoms resolve within a few days, but some individuals may have symptoms for as long as one week.

Common symptoms include:

• Anxiety
• Depression
• Drowsiness
• Fatigue
• Headaches
• Poor concentration
• Muscle spasms
• Irritability
• Weakness or fatigue
• Work difficulty

Less common symptoms include:

• Tremor
• Nausea
• Vomiting
• Heart palpitations