Drinking chamomile tea can cause drowsiness, and if taken in large doses, vomiting, according to WebMD. Chamomile tea may trigger an allergic reaction in people who have allergies to plants in the daisy family. More »

Chamomile tea is safe for children of all ages unless they have an allergy to ragweed or similar plants, according to WebMD. Chamomile can actually help to calm a child down, and is safe because it is a natural herb that... More »

Excessive use of tea can result in increased blood pressure, heart rate as well as constipation. There are numerous varieties of tea, such as black tea and green tea, which are the products of the Camellia sinensis plant... More »

Higher doses of pyridoxine, or vitamin B6, can cause vomiting, drowsiness, tingling and other similar side effects. When taken at the proper dose, pyridoxine is considered safe, WebMD says. More »

www.reference.com Health Medications & Vitamins Side Effects

Drinking oolong tea can cause headaches, nervousness, sleep problems, vomiting and diarrhea, according to WebMD. It can also cause irritability and confusion. These side effects are due to the caffeine content of the tea... More »

Many of the negative side effects of consuming green tea are associated with its caffeine content, including headache, nervousness, trouble falling asleep, vomiting and diarrhea, according to WebMD. Other negative side e... More »

The most common side effects of statins are headache, skin flushing, insomnia, muscle weakness, dizziness, drowsiness, nausea or vomiting, abdominal pain, cramping, diarrhea, constipation and skin rash, according to WebM... More »