







Rohto Zi b
For when you want to refresh tired eyes with an invigorating cool sensation
Ideal for / Ideal when
Product Overview
Rohto Zi b is a Class 2 OTC eye drop designed to refresh tired eyes with an invigorating cool sensation. In addition to a decongestant ingredient, it contains a well-balanced blend of 6 active ingredients, including zinc sulfate hydrate (astringent/anti-inflammatory), neostigmine methyl sulfate (related to focus adjustment function), an antihistamine ingredient, vitamin B6, and potassium L-aspartate. The formula is intended for use when eye fatigue, redness, itching, and similar concerns arise—such as after sports or long drives. It features a free-angle nozzle for easy instillation from any angle, and the solution is colorless and clear. It is also indicated for discomfort while wearing hard contact lenses.
Product Features
Invigorating cool sensation (Level 8)
Cooling SensationFormulated with l-menthol, d-camphor, and peppermint oil for a crisp, refreshing feel that helps refresh tired eyes.
Addresses redness and inflammation
Redness · InflammationContains the decongestant ingredient tetrahydrozoline hydrochloride and the astringent/anti-inflammatory ingredient zinc sulfate hydrate. Also indicated for eye inflammation caused by ultraviolet and other light (such as snow blindness).
Balanced formula with 6 active ingredients
6 IngredientsDesigned with 6 active ingredients so that various eye discomforts—such as fatigue, redness, itching, blurriness, and eye disease prevention—can be addressed within the scope of the official indications.
Active Ingredients
| Ingredient | Amount | Category |
|---|---|---|
| Tetrahydrozoline hydrochloride | 0.05% | Decongestant |
| Neostigmine methyl sulfate | 0.003% | Ingredient related to focus adjustment |
| Zinc sulfate hydrate | 0.05% | Astringent · Anti-inflammatory |
| Chlorpheniramine maleate | 0.03% | Antihistamine (itching) |
| Vitamin B6 | 0.1% | Vitamin supplement |
| Potassium L-aspartate | 1% | Amino acid (related to metabolism) |
Indications
Dosage and Administration
| Age | Dose per use | Times per day |
|---|---|---|
| 15 years and older | 2–3 drops per use | 5–6 times daily |
- This is a Class 2 OTC drug. Read the package insert carefully before use.
- Do not use while wearing soft contact lenses.
- Do not exceed the stated dosage and administration.
- If any abnormality appears around the eyes, or if symptoms do not improve, stop use and consult a physician, pharmacist, or registered seller.
- When using with other eye drops, leave an interval between applications (follow the package insert instructions).
- Keep out of reach of children.
- Store in a cool place away from direct sunlight.
- Refrigerator storage is possible, but take care not to freeze the solution.
- Do not transfer to another container.
- Do not use the product after the expiration date.














































































