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.

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Fatigue 83 19
Excessive daytime sleepiness (somnolence) 35 15
Headaches 24 4
Problems concentrating 12 2
Difficulty waking up 10 1

Show all 52 reasons taken


  • Major
  • Moderate
  • Slight
  • None
  • Can't tell

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 1
Moderate 11
Mild 17
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 29 reported side effects

Dosages

Based on patients currently taking Caffeine

Dosage Patients Percentage
1 dose daily 1
1 other twice daily 1
100 mg daily 1
200 mg daily 1
200 mg twice daily 1
16other as needed 1

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

Currently taking Caffeine

Duration Patients Percentage
1 - 2 years 2
2 - 5 years 1
5 - 10 years 1
10 years or more 3

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 4
5 - 10 years 3
10 years or more 6
Adherence
Adherence Evaluations Percentage
Always 14
Usually 15
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 33
Cost per month
Cost per month Evaluations Percentage
$200+ 0
$100-199 0
$50-99 1
$25-49 5
< $25 24
Not specified 14
Last updated:

9 patient evaluations for Caffeine

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: talk to your MD before taking caffeine in these doses
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: no results
Cost: < $25 monthly

  • 0 helpful marks
Last updated:
Showing 3 of 9 patient evaluations for Caffeine