Nenaito
Difficulty falling asleep, light sleep—on such nights, regain your natural rhythm
For these people and situations
Product Overview
Nenaito is a Class 2 OTC Drug sleep improvement medicine by Kobayashi Pharmaceutical. It contains the active ingredient diphenhydramine hydrochloride to support improvement of temporary insomnia symptoms (difficulty falling asleep, light sleep). It focuses on "temporary insomnia" caused by stress, fatigue, or disrupted lifestyle rhythms, designed for easy self-care in daily life. Taking it before bedtime helps smooth sleep onset and supports the body's rhythm for the next morning.
Product Features
Active ingredient with proven sleep improvement effects
Diphenhydramine HydrochlorideContains diphenhydramine hydrochloride, an active ingredient recognized for promoting drowsiness. Works to improve temporary insomnia symptoms.
Approaches difficulty falling asleep and light sleep
Sleep improvementActs on temporary insomnia symptoms such as "difficulty falling asleep" and "waking up during the night," supporting natural sleep.
Designed for easy use before bedtime
Take before bedtimeDesigned for simple use about 30 minutes before bedtime, easy to incorporate into daily routines.
Kobayashi Pharmaceutical's quality control
Trusted domestic manufacturingManufactured with strict quality control by Kobayashi Pharmaceutical, known for turning "wishful ideas" into reality.
Active ingredient
| Ingredient name | Content amount | Classification |
|---|---|---|
| Diphenhydramine Hydrochloride | 50mg (dose per administration) | Antihistamine (sleep improvement ingredient) |
Indications and Effects
Dosage and Administration
| Age | Dose per administration | Number of doses per day |
|---|---|---|
| 15 years old and above | 1 Tablet per dose | Once, 30 minutes before bedtime |
| Under 15 years old | — | Do not take |
- Do not take if you are: under 15 years old, pregnant or possibly pregnant, breastfeeding, or under medical treatment
- Do not drive or operate dangerous machinery after taking, as drowsiness may occur
- Avoid use with alcohol
- Avoid simultaneous use with other oral medications containing hypnotics, cold medicine, antipyretic analgesics, or antihistamines (such as oral rhinitis medicine, motion sickness medicine, allergy medicine, etc.)
- Do not use continuously (this product is for temporary relief of insomnia symptoms)
- Be cautious as drowsiness may persist until the next day after taking
- Read the attached instructions carefully before use and follow the dosage and administration guidelines
- If symptoms do not improve or if you plan to use it for a long time, consult a doctor, pharmacist, or registered seller
- Store in a cool place, avoiding direct sunlight, high temperature, and humidity
- Keep out of reach of children
- Do not transfer to another container (this may cause misuse or change the quality)
- Do not use the product past its expiration date
