Shingles, a condition also known as herpes zoster, stems from the same virus the causes chickenpox. This virus, the varicella-zoster virus, lies dormant in your nerves and may then flare up, typically in older adults or people with a compromised immune system.

Phentermine is a weight loss medication from the psychostimulant family of drugs. While no specific interactions exist between caffeine and phentermine, combining the two can lead to unwanted side effects. Understanding how caffeine interacts with phentermine allows you to use both substances more safely.

Caffeine intoxication usually means that there is more than 300 mg of caffeine in a person's system--about three cups of strong coffee in less than an hour or six cans of Mountain Dew in about the same about of time.

Caffeine is not known to interact negatively with the medication prednisone. However, this does not mean you won’t have any adverse reactions while consuming caffeine or taking prednisone. Both caffeine and prednisone may cause a number of unpleasant side effects.

Caffeine is a popular stimulant used to activate the central nervous system. In small or moderate amounts it can be effective in relieving people of fatigue while improving their mental alertness. Caffeine's effects are not all positive.

Pekoe is a high-quality black tea made from the downy bud tips and young leaves of the Camellia sinensis plant. Various grades of pekoe tea include orange pekoe, flowery pekoe and fine tippy golden flowery orange pekoe.

Many people wonder if coffee is bad for them. Some switch to decaf in an attempt at healthier living. Studies indicate that a moderate amount of caffeine is safe for most people.

The American Academy of Pediatrics and other medical institutions encourage breastfeeding, pointing out its many health benefits for both you and your baby. If you are unable to breastfeed for medical reasons, bottle-feeding with formula is necessary despite its disadvantages.

Most people are not aware of the importance of the pancreas until something goes wrong with it, according to Johns Hopkins Medicine. The pancreas is a vital organ that plays a role in the digestion of food and the regulation of blood sugar.

Creatine and caffeine are two performance-boosting supplements often used in sports settings. There is a lot of controversy, however, over the effectiveness of using these two substances together. A study published in the October 2001 "Journal of Applied Physiology"

If you are like many people, you might drink caffeinated drinks such as coffee or tea in the morning or throughout the day to wake up and for an extra boost of energy.

Children and teenagers spend an average of four hours a day just on television time, according to the Palo Alto Medical Foundation. Add in computer time, time spent on the Internet or smart phone, and video game playing, and it's easy to see how teens can spend a significant chunk of their waking time plugged in.