Medicine guide
Cinal Vitamin C Medicine in Japan: Uses, Limits and Safety
This guide to Cinal in Japan covers the medical-use vitamin C combination, OTC differences and pigmentation-treatment limits. It separates medicine-specific information from the product and prescription checks needed for an individual consultation.
This page explains how Medical-use Cinal works, its directions, limitations and safety. For prices and individual prescriptions, see SWIFT’s relevant care information.
Medical-use Cinal combines vitamin C and calcium pantothenate. Its approved indications include supplementation for vitamin deficiency and post-inflammatory pigmentation; it does not remove every dark spot. Check ingredients and doses separately from those of the over-the-counter Cinal range.
Medical reviewer: Masashi Morita, MD
Medical-use Cinal combines vitamin C and calcium pantothenate. Its approved indications include supplementation for vitamin deficiency and post-inflammatory pigmentation; it does not remove every dark spot. Check ingredients and doses separately from those of the over-the-counter Cinal range.
- Ingredient/class
- Ascorbic acid/calcium pantothenate
- Eligible patients/indications
- Approved indications include supplementation when vitamin requirements increase beyond what diet can provide, and post-inflammatory pigmentation. Do not group melasma, age spots and freckles together as an approved skin-lightening effect.
- Assessing effects
- There is no uniform time for post-inflammatory pigmentation to fade. The prescribing information advises against continuing for more than 1 month without benefit. If there is no change, review the diagnosis and treatment.
- Clinic care
- Service information supported by public sources is identified in the article. Final prescribing decisions are made during consultation.
What the medicine is
This product supplies ascorbic acid and calcium pantothenate. Each tablet contains 200 mg vitamin C and 3 mg calcium pantothenate. The name Cinal alone does not establish that its composition matches an over-the-counter product.
Eligible patients and approved indications
Approved indications include supplementation when vitamin requirements increase beyond what diet can provide, and post-inflammatory pigmentation. Do not group melasma, age spots and freckles together as an approved skin-lightening effect.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
Medical-use Cinal has approved indications including post-inflammatory pigmentation, but approval does not extend to every type of dark spot or cosmetic goal. If it is used outside the approved indications, discuss the limits of expected benefits, adverse effects and alternatives with a doctor. The care purpose determines whether Japanese health insurance can apply; confirm the conditions and fees during consultation.
Japan’s Relief System for Sufferers from Adverse Drug Reactions covers qualifying serious health harm that occurs despite appropriate use. Off-label use and other circumstances may fall outside coverage. Eligibility is assessed individually in light of the purpose and manner of use and medical and pharmaceutical knowledge; discuss this with the doctor and contact PMDA if needed.
Treatment limitations and when diagnosis is needed
Oral treatment alone does not remove depressed acne scars, deep pigment or raised lesions. Other lesions can resemble pigmentation; changing spots or lesions that bleed require examination.
Formulations and basic directions
The approved adult directions for the medical-use combination are 1–3 tablets per dose, 1–3 times daily, adjusted for age and symptoms. Check total intake including supplements and other vitamin products; do not increase the dose yourself.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
Timing of response and decisions about continuation
There is no uniform time for post-inflammatory pigmentation to fade. The prescribing information advises against continuing for more than 1 month without benefit. If there is no change, review the diagnosis and treatment.
Side effects and symptoms to watch for
Side effects include stomach discomfort, nausea, vomiting and diarrhea. A vitamin medicine is not safe in unlimited amounts.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
When to stop and seek medical attention
Contact the prescriber for persistent or severe gastrointestinal symptoms. For sudden severe abnormalities such as breathing difficulty or facial swelling, do not take additional doses; seek medical attention.
Restrictions and interactions
It can affect tests such as urine glucose, urine occult blood and fecal occult blood, making actual abnormalities harder to detect. Disclose use before a health check or test. Also check overlapping supplements and medical history.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
Pregnancy, breastfeeding and patient precautions
Vitamin supplementation during pregnancy and breastfeeding is included among approved indications, but this does not permit self-increasing the dose for cosmetic purposes. Discuss the dose and need during pregnancy with a doctor.
Additional care
Consider sun protection and care that avoids increasing inflammation or friction. Do not rely solely on medicine for nutrition; assess diet and the cause of pigmentation.
Storage and quality checks
Store at room temperature in the original packaging. Mixing with medicines prone to absorbing moisture or crushing may need to be avoided; do not alter it yourself, and consult a pharmacist.
Differences from other medicines and treatments
Tranexamic acid, L-cysteine and vitamin E are different ingredients with different approved indications. Check the diagnosis and ingredient duplication before adding several oral skin-lightening medicines.
Discussing consultation and prescribing with SWIFT
SWIFT’s official oral cosmetic medicine page lists Cinal, 90 tablets for 1 month, at JPY 1,400. Distinguish general prescribing-information doses from the clinic’s individual instructions, and confirm the latest total for online care during consultation. Confirm the tax treatment and complete payable total, including consultation and shipping fees, during consultation.
Frequently asked questions
Is it the same as over-the-counter Cinal?
Composition and doses differ within the range. Do not apply the medical-use combination-tablet explanation to over-the-counter products.
For Cinal, does it work for every dark spot?
Pigmentation within the approved indication differs from other dark spots. Treatment depends on diagnosis.
For Cinal, what should I disclose before tests?
Disclose use. It may affect urine tests and fecal occult blood tests.
Medical supervision
Dr Masashi Morita (Board-certified specialist and supervising physician, Japanese Urological Association / Board-certified specialist, Japan Endocrine Society / Doctor of Medical Science).