# Can I make my own bloodshot eye reliever?

**URL:** <https://boards.straightdope.com/t/can-i-make-my-own-bloodshot-eye-reliever/130791>\
**Category:** Factual Questions\
**Created:** [October 4, 2002, 4:17am UTC](https://boards.straightdope.com/t/can-i-make-my-own-bloodshot-eye-reliever/130791 "2002-10-04T04:17:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![samboy](https://avatars.discourse-cdn.com/v4/letter/s/cdc98d/32.png) [@samboy](https://boards.straightdope.com/u/samboy)\
**Post date:** [October 4, 2002, 4:17am UTC](https://boards.straightdope.com/t/can-i-make-my-own-bloodshot-eye-reliever/130791/1 "2002-10-04T04:17:39Z")

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I bought a little bottle of Visine the other day to clear up my bloodshot eyes. Now I must say that the stuff worked like a charm, perfectly clear eyes almost instantly. The only thing I disliked about the product was that it had written on the bottle “Discard 4 weeks after opening”. There is no way I would use the whole bottle within 4 weeks and Im not going to buy a new one every month so I wanted to know if I can make my own at home.

[Visines’ webpage](http://www.pfizer.com/chc/visine/index.html) lists the active ingredient as  
\*\*Tetrahydrozoline Hydrochloride 0.05%. \*\*

So what is this ingredient and can I make this product at home?