What Is Eyebright Used For and How Does it Work?
Eyebright suggested uses include eye inflammation and irritation.
Eyebright is available under the following different brands and other names: augentrostkraut, Euphrasia officinalis, and ocularia.
What Are the Dosages of Eyebright?
Dosages of Eyebright:
- See package labels
Dosage Considerations – Should be Given as Follows:
Topical
- Rnse eyes with a 2% solution three to four times daily
Oral
- Oral: 2 caps two to three times daily (cap sizes vary)
- Tincture: (1:5 in 45% alcohol) 2-6 mL three times daily
- Liquid Extract: (1:1 in 25% alcohol) 2-4 mL three times daily
Administration
- Oral: take with water at mealtimes
What Are Side Effects Associated with Using Eyebright?
Side effects of Eyebright include:
- Confusion
- Headache
- Nausea
- Constipation
- Cough
- Trouble breathing
- Trouble sleeping (insomnia)
Side effects of eyebright applied to the eye (NOT recommended) include:
- Eye Infections
- Tearing
- Itching
- Redness
- Vision Problems
This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.
What Other Drugs Interact with Eyebright?
If your doctor has directed you to use this medication, your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor, health care provider or pharmacist first.
- Eyebright has no listed interactions with other drugs.
This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist. Check with your physician if you have health questions or concerns.
What Are Warnings and Precautions for Eyebright?
Warnings
- This medication contains eyebright. Do not take augentrostkraut, Euphrasia officinalis, or ocularia if you are allergic to eyebright or any ingredients contained in this drug.
- Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center immediately.
Contraindications
- None reported.
Effects of Drug Abuse
- No information is available.
Short-Term Effects
- See "What Are Side Effects Associated with Using Eyebright?"
Long-Term Effects
- Continuous use for 3-6 months may cause dizziness, dry mouth, nose bleeds, and upset stomach
- See "What Are Side Effects Associated with Using Eyebright?"
Cautions
- None reported.
Pregnancy and Lactation
- There is no information available about the use of eyebright during pregnancy or while breastfeeding. Consult your doctor.
From 
https://www.webmd.com/vitamins/ai/ingredientmono-109/eyebright