ACTIVE INGREDIENTS: Sodium carbomethylcellulose (0.25% in drops, 1.0% in liquid gel)
PRESERVATIVE: Sodium perborate in bottle version; unit doses preservative free.
TYPICAL PRICING: $10.49 for 15mL bottle, $13.99 for 30mL bottle, $11.99 for 32 unit doses, $12.99 for 28 doses of liquid gel on www.theratears.com as of Sept 2006.