Caffeine is a stimulant found in colas, coffee, tea, chocolate, cocoa, and some over-the-counter and prescription drugs. Large quantities of caffeine can cause irritability, nervousness and insomnia as well as low birth-weight babies. Caffeine is also a diuretic and can rob your body of valuable water.

Some studies show that drinking caffeine during pregnancy can harm the fetus. Other research suggests that small amounts of caffeine are safe. Talk to your doctor before drinking caffeine during pregnancy. Caffeine is an ingredient in many over-the-counter and prescription drugs. Talk with your doctor before taking any drugs or medicines while pregnant.