Merlion Naturals Tulsi Tablets is an Ayurvedic medicine that is primarily used for the treatment of Weak immune system, Common Cold, Cough and Lung Infections. The key ingredient of Merlion Naturals Tulsi Tablets is Tulsi. The properties of which have been shared below. The correct dosage of Merlion Naturals Tulsi Tablets depends on the patient's age, gender, and medical history. This information has been provided in detail in the dosage section. best tulsi drops for immunity