- Lotus seeds are obtained from the lotus flower. Traditionally, lotus seeds were used to treat people with sleeping disorders such as insomnia. They are also known to be effective in alleviating restlessness. This is due to the natural sedative and calming effects of the seeds.The seeds contain alkaloid constituents that relax the nerves and the muscles. They also promote sleep. Restlessness and nervousness – even depression – have been treated traditionally using the seeds.