Eye drop preparation comprising xanthan gum and terpenoid
The present invention provides an ophthalmic solution containing xanthan gum and terpenoid, which shows a suppressed decrease in the terpenoid content, by the addition of xanthan gum to an ophthalmic solution containing terpenoid.
1. An ophthalmic solution comprising xanthan gum and monoterpene, wherein:
the concentration of the xanthan gum is 0.2-0.7 w/v % and the concentration of the monoterpene is 0.002-0.05 w/v %,
the weight ratio of monoterpene:xanthan gum in the ophthalmic solution upon preparation is 1:350-1:4, and
a container used therefore is a plastic container.
2. The ophthalmic solution of claim 1 , wherein the monoterpene is menthol and/or camphor.
3. A method for suppressing a decrease in the content of monoterpene, which comprises adding xanthan gum to an ophthalmic solution comprising monoterpene,
wherein the concentration of the xanthan gum is 0.2-0.7 w/v % and the concentration of the monoterpene is 0.002-0.05 w/v %, and
wherein a container used therefore is a plastic container.
4. The method of claim 3 , wherein the monoterpene is menthol and/or camphor.