We all might have suffered from the bad pain of the head that makes us so tired and then we are unable to concentrate on any of our works as we are not in the state to do anything due to our pain, Zandu balm is a very effective pain reliever and especially it does not have any side effects it works instantly upon our pain and makes us relieved from that pain. Zandu balm is very effective but the only problem I see in it is that its stinking smell but our pain gets relieved due to that very smell and it is a common product that is available at every general store. Good product.