>>>I am suffering from sleeping problem please suggest some online medicine available for it<<<
Hands down, the BEST herb for inducing sound sleep is Lady's Slipper root (we have a tincture of that available in our Storefront, and an average dosage is 1-3 teaspoons)
However, sleeping problems are not caused by a lack of herbs, isolated plant chemicals or pharmaceuticals (although pharmaceuticals and various alternative/unnatural supplements can easily induce sleep problems)...so taking herbs/other isn't likely to heal whatever is actually causing your inability to sleep properly.
There are MANY different reason for sleep disturbances. If you'd like more information about treating & curing the cause naturally, then please feel free to post more information.
I have been using castor oil on my eyelids at night and it has helped me to sleep deep. I've also used melatonin or tryptophan. Some times I use the castor oil with one of the supplements I listed.