Generally, the sugar content of medicinal syrup is low, so attention should be paid to preservation and preservatives should be added. Syrup refers to an oral concentrated sucrose aqueous solution containing drugs, medicinal extracts or aromatic substances. Syrups can be divided into single syrup, medicinal syrup and aromatic syrup according to the different components and uses.
The sugar content of syrup should be no less than 45%(g/ml). Sucrose and aromatic agents can mask the bad smell of drugs and improve the taste, which is especially popular with children. The syrup is easy to be contaminated by microorganisms, and preservatives should be added to the syrup with low concentration. The dosage of benzoic acid and sorbic acid in common antiseptic thorn should not exceed 0.3%, and the dosage of parabens should not exceed 0.05%.
Preservatives refer to natural or synthetic chemical components, which are used to add foods, medicines, pigments, biological specimens, etc. to delay the growth of microorganisms or the corruption caused by chemical changes. Nitrite and sulfur dioxide are common preservatives. Up to now, China has approved 32 kinds of food preservatives, among which sodium benzoate and potassium sorbate are the most commonly used.
The following erroneous statements about syrup are as follows: A. Syrup itself has bacteriostatic effect, so there is no need to add preservatives. B. Single syrup can be used as correctant, and suspending agents C. Syrup refers to concentrated sucrose aqueous solution containing drugs or aromatic substances. D. Cold dissolution method is suitable for preparing syrup for thermally unstable or volatile drugs. E. The preparation of syrup should be answered in a bacteria-free environment: A.