How long to take lecithin complex iodine tablets to see the effect is uncertain, there are individual differences in the time to see the effect, clinical often for about 2 weeks. Lecithin complexed iodine tablets instructions pointed out that 4 hours after taking this product, the drug from the blood to the thyroid gland transfer, to reach the highest value of 24 ~ 120 hours, 336 hours later there is still a high distribution. However, the time of effect due to the degree of disease, treatment timing and sensitivity to the drug and other individual differences, can not determine the specific time. Clinically, the effect is usually seen in about 2 weeks. Lecithin complex iodine tablets are used for the treatment of central exudative or central plasma choroidal retinopathy, vitreous hemorrhage, central retinal vein obstruction, vitreous clouding. Adverse reactions can be seen as rash, raw gastrointestinal discomfort. Allergic to iodine patients are prohibited. It is recommended that patients should be under the guidance of a doctor to use the drug reasonably.