Common Nausea, Vomiting, Skin rash, Allergic reaction.

Expert advice for Locula Eye Drop

Do not use if the sulphacetamide solution changes color.
Seek immediate medical attention is you experience signs of a secondary infection, as long-term or repeated use of sulfacetamide drops may trigger the same. 
Seek immediate medical attention if you experience any allergic symptoms such as rash, red, swollen, blistered, or peeling skin.
Avoid direct contact with the applicator tip to prevent any contamination. Keep the container tightly closed.
Do not drive or use any machinery after taking sulphacetamide as it may blurred the vision. 
Tell your doctor if you are pregnant, planning to become pregnant or are breastfeeding. 
Do not take if patient is allergic to sulphacetamide or any of its ingredients. 
Do not given Infants less than 2 months.