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What is Caffeine?

Category: Over the Counter Drugs

Most popular types: NoDoz Vivarin

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Caffeine is a mild stimulant found in a range of popular drinks such as tea, coffee, and carbonated soft drinks. It has positive effects on mental alertness and concentration. Overuse can cause anxiety and insomnia, however. Some 90% of Americans use caffeine every day.

See patients taking Caffeine

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Fatigue 85 22
Excessive daytime sleepiness (somnolence) 36 15
Headaches 24 4
Problems concentrating 12 2
Difficulty waking up 10 1

Show all 53 reasons taken

  • Major
  • Moderate
  • Slight
  • None
  • Can't tell
See all 614 patients that have taken Caffeine

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 1
Moderate 13
Mild 18
None 15

Commonly reported side effects and conditions associated with Caffeine

Side effect Patients Percentage
Insomnia 6
Anxious mood 3
Jittery feeling 3
Thirst 3
Bowel urgency 2
Dehydration 2

Show all 31 reported side effects

Why patients stopped taking Caffeine

Multiple reasons could be selected

Reason Patients Percentage
Doctor's advice 8
Side effects too severe 7
Other 6
Did not seem to work 5
Personal research 1
See all 24 patients who've stopped taking Caffeine

Duration

Stopped taking Caffeine

Duration Patients Percentage
Less than 1 month 2
1 - 6 months 4
6 months - 1 year 4
1 - 2 years 1
2 - 5 years 3
5 - 10 years 4
10 years or more 6
Adherence
Adherence Evaluations Percentage
Always 16
Usually 16
Sometimes 11
Never taken as prescribed 4
Burden
Burden Evaluations Percentage
Very hard to take 0
Somewhat hard to take 3
A little hard to take 8
Not at all hard to take 36
Cost per month
Cost per month Evaluations Percentage
$200+ 0
$100-199 0
$50-99 1
$25-49 5
< $25 26
Not specified 15
Last updated:

9 patient evaluations for Caffeine

Sort by: Most recent

Apr 11, 2018 (Started Jul 01, 2015)

  • Effectiveness
    Major (for excessive daytime sleepiness (somnolence))
  • Effectiveness
    Major (for narcolepsy)
  • Side effects
    None
  • Adherence
    Usually
  • Burden
    Not at all hard to take
Dosage: 400 mg Three times daily
Advice & Tips: Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Phasellus faucibus turpis sed mi maximus mattis.
Cost: < $25 monthly
  • 0 helpful marks

Sep 15, 2016 (Started Jun 30, 2012)

  • Effectiveness
    Moderate (for excessive daytime sleepiness (somnolence))
  • Effectiveness
    Moderate (for fatigue)
  • Side effects
    Mild (headaches)
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 200 mg Daily
  • 0 helpful marks

Jan 4, 2010 (Started Feb 10, 1958)

  • Effectiveness
    Can't tell (for headaches)
  • Side effects
    None
  • Adherence
    Never taken as prescribed
  • Burden
    Not at all hard to take
Dosage: 40 mg Daily
Advice & Tips: Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Phasellus faucibus turpis sed mi maximus mattis.
Cost: < $25 monthly
  • 0 helpful marks
Last updated:
Showing 3 of 9 patient evaluations for Caffeine