Caffeine pills

caffeine pillsCaffeine pills



Caffeine is the most consumed psychoactive substance (a substance that stimulates the central nervous system) and therefore a drug. It was estimated that about 80% of the world’s population consume caffeine every day. Caffeine is so popular, because of its stimulating effect on the brain. The consumption of caffeine may alleviate fatigue, increase the feeling of wakefulness and improve concentration and focusing.

However, according to the researches 5 grams of caffeine (equivalent to 30-40 cups of regular coffee) may cause the death of the consumer.


Brand names

NoDoz, Vivarin, Revive, Stay Awake, Enerjets, Lucidex.



Caffeine drugs should be kept at room temperature (between 15-30 degrees C) away from heat, moisture and light. It is recommended to store the medicines in a closed container.



Caffeine pills are used to increase alertness and boost wakefulness if fatigue is expected.

However, caffeine should not be used as a sleep substitute.



One pill contains 200 mg of caffeine. The maximal dose per day is 1600 mg, i.e. not more than 1 pill every 3-4 hours.

The tablet may be taken both without regard to food, although it’s recommended to take a pill with food if any caffeine-related stomach side effects are known.

Related: Caffeine Doesn’t Increase the Arrhythmia Risk, Study


Contraindications to caffeine-containing medicines include allergy to caffeine and the age under 12. It is not recommended to use caffeine to reduce sleepiness or substitute the proper sleep.


Side effects

Common side effects of caffeine include:

  • difficulty sleeping/insomnia;
  • agitation, nervousness or anxiety, irritability;
  • restlessness;
  • haluzinations;
  • gastritis;
  • nausea, diarrhea and vomiting;
  • headache;
  • serious allergic reactions;
  • tachycardia (rapid heart rate) or increased blood pressure;
  • chest pain;
  • flushing;



Caffeine should not be used by pregnant women, those who are feeding or planning to become a mother. A person should be aware of the interactions between caffeine and the other medicines or supplements before taking caffeine pills. Nervousness or anxiety, difficulties falling asleep and other medical conditions (heart or liver diseases, seizures, etc.) require careful use of caffeine pills after the consultation with a person’s doctor.


Drug interactions

Caffeine is known to interact with many other medicines such as:

  • Aspirin;
  • Theophylline;
  • Methotrexate;
  • Thiabendazole;
  • Tizanidine;
  • Adenosine;
  • Diazepam;
Caffeine tolerance test

Caffeine tolerance test

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