Rex Lauq Sapistan Khyar Shambari is an ayurvedic medicine Secondary and off-label uses of Rex Lauq Sapistan Khyar Shambari have also been mentioned below. The correct dosage of Rex Lauq Sapistan Khyar Shambari depends on the patient's age, gender, and medical history. This information has been provided in detail in the dosage section. Chest rub balm relieves congestion, soothes coughs, eases breathing, reduces muscle aches, and promotes restful sleep during colds