Oolong Tea

How does Oolong Tea work?

Oolong tea contains caffeine. Caffeine works by stimulating the central nervous system (CNS), heart, and muscles. Oolong tea also contains theophylline and theobromine, which are chemicals similar to caffeine.

Are there safety concerns?

Too much oolong tea, more than five cups per day, can cause side effects because of the caffeine. These side effects can range from mild to serious and include headache, nervousness, sleep problems, vomiting, diarrhea, irritability, irregular heartbeat, tremor, heartburn, dizziness, ringing in the ears, convulsions, and confusion.

If you are pregnant or breast-feeding, oolong tea in small amounts is probably not harmful. However, do not drink more than three cups a day of oolong tea. Too much caffeine might cause premature delivery, low birth weight, and harm to the baby.

Caffeine is probably safe in children in amounts commonly found in foods.

Do not take oolong tea if:
  • You have a heart condition.
  • You have anxiety.
  • You have an eye disease called glaucoma.
  • You have osteoporosis.
  • You have a bleeding condition.

Therapeutic Research Faculty copyright

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.