Jasmine tea is green tea blended with scent of jasmine flowers. It is the most preferred aromatic tea in China.
How is jasmine tea made?
The primary ingredient of the tea is Camellia sinensis, the plant used to make teas like green, black, white and oolong. Typically, green tea is picked as the base for jasmine tea. But, black, white and oolong teas might also be used. Blossoms of jasmine can be sometime used as secondary ingredient, giving more fragrance to the tea.
How is it different from other tea?
Jasmine tea has unique subtle sweet taste but strong fragrance which calms the taste bud and mind simultaneously.
Side effects of jasmine tea
Although several benefits of jasmine tea have been recognized, it is still suggested to drink this tea with caution. Some side effects of jasmine tea are:
Many people might have allergies to scent or pollen grains of flowers. Such people might get itchy or running nose as a result of smelling jasmine tea.
These people might even suffer serious issues such as irritated throat, diarrhea and cramps in cases when jasmine tea is ingested.
Irritability, sleeplessness and anxiety
Jasmine tea is prepared from either green, black or oolong tea, all of which are good source of caffeine. Therefore drinking more amount of jasmine tea can cause issues such as anxiety, insomnia, irritability, dizziness, etc. as a result of high caffeine intake. 
Jasmine has a chemical component called linalool, a naturally occurring terpene alcohol which produces sedative effect (slow or uncertain reflexes, staggering, slurred speech, etc.) when inhaled.
It is therefore advised to avoid jasmine tea if you are driving or doing works that need alertness. 
Green tea is acidic in nature but jasmine tea is even more acidic. As a result, drinking jasmine tea on an empty stomach or drinking it excessively might result an upset stomach.
Also drinking too much of green tea can cause constipation. 
Reaction with medicine
Like green tea, jasmine tea also contains various chemical components which might react with the medicine that you intake. Especially, medicines of blood pressure, chemotherapy, mood disorders, etc. are supposed to react with the tea.
Therefore, it would be a wiser decision to consult your doctor if you are thinking of consuming jasmine tea under any medication.