Methylxanthines

Question 1

Major pharmacological effects observed in methylxanthines?

Answer 1

CNS Stimulant

Adenosine receptor antagonist

Question 2

What herbs are known to contain methylxanthines?

Answer 2

Coffea arabica, C. robusta (coffee)
Camellia sinensis (tea)
Theobroma cacao (cacao, chocolate)
Cola nitida, C. acuminata (Kola nut)
Paullinia cupana (Gaurana)
Ilex paraguariensis (Yerba mate)

Question 3

Classify the chemical structures of L-Theanine and epigallocatechin gallate. Both are found in Camellia sinensis

Answer 3

L-theanine- non protein amino acid

epigallocatechin gallate - flavonoid,

Question 4

Cautions and contraindications of Camellia sinensis

Answer 4

Hypertension, liver disease, insomnia, anxiety

Question 5

Methylxanthines are a group of alkaloids also known as

Answer 5

Purine alkaloids