Tell your doctor if you have ever had any unusual or allergic reaction to medicines in this group or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
With the exception of infants, there is no specific information comparing use of caffeine in children with use in other age groups. However, this medicine is not expected to cause different side effects or problems in children than it does in adults.
Many medicines have not been studied specifically in older people. Therefore, it may not be known whether they work exactly the same way they do in younger adults or if they cause different side effects or problems in older people. There is no specific information comparing use of caffeine in the elderly with use in other age groups.
Studies in humans have shown that caffeine may cause miscarriage or may slow the growth of a developing fetus when given in doses greater than 300 mg (an amount equal to three cups of coffee) a day. In addition, use of large amounts of caffeine by the mother during pregnancy may cause problems with the heart rhythm of the fetus. Therefore, it is recommended that pregnant women consume less than 300 mg of caffeine a day. Studies in animals have shown that caffeine causes birth defects when given in very large doses (amounts equal to 12 to 24 cups of coffee a day) and problems with bone growth when given in smaller doses.
Caffeine passes into breast milk in small amounts and may build up in the nursing baby. Studies have shown that babies may appear jittery and have trouble in sleeping when their mothers drink large amounts of caffeine-containing beverages.
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
Other Medical Problems
The presence of other medical problems may affect the use of medicines in this class. Make sure you tell your doctor if you have any other medical problems, especially:
- Agoraphobia (fear of being in open places) or
- Anxiety or
- Convulsions (seizures) (in newborn babies) or
- Heart disease, severe or
- High blood pressure or
- Panic attacks or
- Trouble in sleeping—Caffeine may make the condition worse.
- Liver disease—Higher blood levels of caffeine may result, increasing the chance of side effects.