Active Ingredient in Sustain Eye Drops
I cannot definitively identify the active ingredient in "Sustain" eye drops from the provided evidence, as none of the sources specifically mention a product by this exact name.
What the Evidence Shows
The evidence provided focuses on general dry eye treatment guidelines and various artificial tear formulations, but does not contain specific information about a product called "Sustain" eye drops. The sources discuss several common active ingredients used in artificial tears:
Common Artificial Tear Active Ingredients Mentioned
- Carboxymethylcellulose sodium (0.5-1%) is a widely used lubricant in artificial tears, as noted in FDA labeling 1
- Hydroxypropyl methylcellulose (HPMC) is one of the most popular therapeutic ingredients in artificial tears for dry eye disease 2
- Propylene glycol and polyethylene glycol serve as active demulcents in some formulations 3, 4
- Hyaluronic acid/hyaluronate is recommended as a first-line treatment component by multiple guidelines 5, 6
Clinical Context
If you are asking about a specific commercial product called "Sustain," you would need to check the product packaging or FDA labeling directly, as this information is not available in the provided evidence. Different manufacturers may use the same or similar brand names for products with different formulations 7.
Important Safety Note
- Recent public health concerns have emerged regarding contamination of some preservative-free artificial tear products, emphasizing the importance of verifying product authenticity and manufacturing standards 7
To obtain accurate information about the specific "Sustain" product you're inquiring about, I recommend checking the product label directly or contacting the manufacturer.