In this video, only onions and honey are used. The woman in the video only speak Hindu, so we do not know how many cups, or how long to take this drink. What I will do is make a bunch and sip through it all day and do it the next day if I feel better. When a home remedy is working, usually you keep doing what you are doing for 4 to 7 days, cause you really want that thing to go away...
Strain the onion and mix with honey to taste. You can drink hot or cold,
Another version of this recipe would be to make onion soup and eat through the day. The onion and garlic make a powerful combo too.