Passion flower has also been used in the treatment of nervous disorders, epilepsy and hyperactive children, bronchial asthma, insomnia, nervous gastrointestinal disorders and menopausal problems.
Passion flower however was sometimes used as a mild hallucinogen by native Caribbean natives, similar to marijuana. The Caribbean natives would drink a tea made from the leaves of the passion fruit, and go into a trance to speak to their ancestral spirits. This practice was stopped after the Spanish conquered them, and converted them to Catholicism.
There is a study done in the USA, that studied the effect of fruit juices on those who have cancer. The results proved that yellow passion fruit extracts can kill cancer cells in vitro. The phytochemicals which are responsible for this anti-cancer effect are carotenoids and polyphenols.
The variety of passion fruit we have in the Philippines is the yellow one. The Spanish brought in the passion fruit vines of yellow passion fruit to the Philippines. The purple passion fruit grows in Central and South America, and the peel extract can reduce asthma symptoms. Another study focused on 42 asthmatic patients and gave them an oral administration of purple passion fruit extract. The passion fruit extract supplementation reduced the wheezing by 75 percent and increased forced vital capacity.
Passion fruit peel extract also cures knee osteoarthritis. Medical doctors did a study on patients suffering from arthritis. The results was that it was discovered that the flavanoid rich extract significantly reduced pain and stiffness.
Spanish priests who arrived with the explorers that eventually conquered Central and South America discovered native medicine men using this passion fruit as medicine. The passion fruit juice made people relaxed and sleepy. The leaves were made into a tea, and used as a sleep-inducing medicine. The name 'Passion' was given by Catholic missionaries in South America. The corona threads of the passion flower were seen as a symbol of the crown of thorns, the five stamens for wounds, the five petals and five sepals as the ten apostles (excluding the two that betrayed Jesus, namely Judas and later Peter who denied knowing Jesus after the arrest of Jesus at the garden of Gesethame) and the three stigmas for the nails on the cross.