The wake-up call of a morning cup of tea becomes tossing and turning if you drink two cups of tea before going to bed. It can also interfere with a persons ability to sleep.
Caffeine can also have some serious side effects.
It is known to raise blood pressure. Caffeine is one of the world's most widely used drugs, and has been around for centuries. Caffeine is a common ingredient in beverages such as coffee, tea, chocolate, soft drinks and cocoa. Caffeine is even found in some pain relievers. Many Americans start their day with a cup of coffee and may end their day with a cup after dinner.