PATIENT INFORMATION—For Topical Use Only
Complete skin care regimen formulated with 4% hydroquinone to reduce hyperpigmentation and other essential ingredients to help address the signs of skin aging caused by photoaging.
Please read this product information prior to use of the Obagi-C® Rx System. Any questions regarding your particular skin care regimen should be directed to your physician. More information about the Obagi-C® Rx System or other Obagi® systems is available on our website at www.obagi.com.
62032-106-10 Obagi-C® Rx System C-Clarifying Serum for Normal to Dry Skin
Each gram of Obagi-C® Rx System C-Clarifying Serum for Normal to Dry Skin contains:
Active: Hydroquinone, USP 4% (40 mg per g)
Inactives: ascorbic acid, propylene carbonate, propylene glycol, sodium lauryl sulfate, water
62032-122-10 Obagi-C® Rx System C-Clarifying Serum for Normal to Oily Skin
Each gram of Obagi-C® Rx System C-Clarifying Serum for Normal to Oily Skin contains:
Active: Hydroquinone, USP 4% (40 mg per g)
Inactives: ascorbic acid, dipropylene glycol, fragrance, propylene carbonate, propylene glycol, SD alcohol-39-C, sodium lauryl sulfate, water
62032-105-36 Obagi-C® Rx System C-Therapy Night Cream
Each gram of Obagi-C® Rx System C-Therapy Night Cream contains:
Active: Hydroquinone, USP 4% (40 mg per g)
Inactives: ascorbic acid, BHT, cetyl alcohol, disodium EDTA, glycerin, lactic acid, methylparaben, phenyl trimethicone, PPG-2 myristyl ether propionate, propylparaben, saponins, sodium lauryl sulfate, sodium metabisulfate, TEA-salicylate, tocopheryl acetate, water
DESCRIPTION
Hydroquinone is 1,4-benzenediol. Hydroquinone occurs as fine, white needles. The drug is freely soluble in water and in alcohol. Chemically, hydroquinone is designated as p-dihydroxybenzene; the empirical formula is C6H6O2; molecular weight is 110.11 g per mol.
The chemical structure is in the diagram.
CLINICAL PHARMACOLOGY
Topical application of hydroquinone produces a reversible depigmentation of the skin by inhibition of the enzymatic oxidation of tyrosine to 3, 4-dihydroxyphenylalanine (DOPA) and suppression of other melanocyte metabolic processes. Exposure to sunlight or ultraviolet light will cause repigmentation of the bleached areas, which may be prevented by the use of sunscreen agents contained in the Obagi-C® Rx System Sun Shield Matte Broad Spectrum SPF 50.
INDICATIONS AND USAGE
The gradual bleaching of hyperpigmented skin conditions such as chloasma, melasma, freckles, senile lentigines, and other unwanted areas of melanin hyperpigmentation.
DOSAGE AND ADMINISTRATION
A thin application should be applied once or twice daily or as directed by a physician. If no improvement is seen after three (3) months of treatment, use of this product should be discontinued. Sun exposure should be limited by using a sunscreen agent or protective clothing to cover bleached skin when using and after using this product in order to prevent darkening from reoccurring.
WARNINGS
- Hydroquinone is a skin-bleaching agent, which may produce unwanted cosmetic effects if not used as directed. The physician should be familiar with the contents of this insert before prescribing or dispensing this product.
- Test for skin sensitivity before using by applying a small amount to an unbroken patch of skin and check within 24 hours. Minor redness is not a contraindication, but where there is itching or vesicle formation or excessive inflammatory response, the product should be discontinued and a physician consulted. Close patient supervision is recommended.
- Avoid contact with eyes, nose, mouth, and lips. In case of accidental contact, the patient should rinse thoroughly with water and contact a physician.
- Sunscreen use is an essential aspect of hydroquinone therapy because even minimal sunlight exposure sustains melanocytic activity.
The Obagi-C® Rx System C-Therapy Night Cream contains sodium metabisulfite, a sulfite that may cause allergic-type reactions including anaphylactic symptoms and lifethreatening or less severe asthmatic episodes in certain susceptible people. The overall prevalence of sulfite sensitivity in the general population is unknown and probably low. Sulfite sensitivity is seen more frequently in asthmatic than in nonasthmatic people.
PRECAUTIONS
(See WARNINGS.)
Treatment should be limited to relatively small areas of the body at one time since some patients experience a transient skin reddening and a mild burning sensation, which does not preclude treatment.
Pregnancy
Pregnancy Category C
Animal reproduction studies have not been conducted with topical hydroquinone. It is also not known whether hydroquinone can cause fetal harm when used topically on a pregnant woman or affect reproductive capacity. It is not known to what degree, if any, topical hydroquinone is absorbed systemically. Topical hydroquinone should be used on pregnant women only when clearly indicated.
ADVERSE REACTIONS
No systemic adverse reactions have been reported. Occasional hypersensitivity (localized contact dermatitis) may occur, in which case the product should be discontinued and physician notified immediately.
To report SUSPECTED ADVERSE REACTIONS, contact Obagi Cosmeceuticals LLC, at 1-800-636-7546 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
CONTRAINDICATIONS
People with prior history of sensitivity or allergic reaction to this product or any of its ingredients should not use it. The safety of topical hydroquinone use during pregnancy or in children (12 years and under) has not been established.
HOW SUPPLIED
Obagi-C® Rx System C-Clarifying Serum
(Hydroquinone, USP 4%) for Normal to Dry Skin is available as follows:
1 fl. oz. (30 mL) bottle
NDC 62032-106-10
Obagi-C® Rx System C-Clarifying Serum
(Hydroquinone, USP 4%) for Normal to Oily Skin is available as follows:
1 fl. oz. (30 mL) bottle
NDC 62032-122-10
Obagi-C® Rx System C-Therapy Night Cream
(Hydroquinone, USP 4%) is available as follows:
Net wt. 2 oz. (57 g) bottle
NDC 62032-105-36
Distributed by Obagi Cosmeceuticals LLC,
Long Beach, CA 90806
U.S. Patent 6,299,889
All products/brand names, whether
designated by notice or not (®/TM), are
trademarks of Obagi Cosmeceuticals LLC
and/or its affiliates.
©2019 Obagi Cosmeceuticals LLC.
All rights reserved.
www.obagi.com
9578903 Revised: 1/2019
Uses
- helps prevent sunburn
- If used as directed with other sun protection measures (see Directions), decreases the risk of skin cancer and early skin aging caused by the sun
Directions
- apply liberally 15 minutes before sun exposure
- use a water resistant sunscreen if swimming or sweating
- reapply at least every 2 hours
-
Sun Protection Measures. Spending time in the sun increases your risk of skin cancer and early skin aging. To decrease this risk, regularly use a sunscreen with a Broad Spectrum SPF value of 15 or higher and other sun protection measures including:
- limit time in the sun, especially from 10 a.m.–2 p.m.
- wear long-sleeved shirts, pants, hats, and sunglasses
- children under 6 months: Ask a doctor
Other information
- store at controlled room temperature: 15°C–25°C (59°F–77°F)
- protect this product from excessive heat and direct sun
Inactive ingredients
Water (Aqua), C15-19 Alkane, Octyldodecyl Neopentanoate, Polymethylsilsesquioxane, Sorbitan Olivate, Silica, Polyglyceryl-6 Polyrininoleate, Sodium Chloride, Xanthan Gum, Glycerin, Hydroxyacetophenone, Disodium EDTA, 1,2-Hexanediol, Caprylyl Glycol, Sodium Hydroxide, Triethoxycaprylsilane, Polyhydroxystearic Acid, Disteardimonium Hectorite, Polyglyceryl-2 Isostearate, Euphorbia Cerifera (candelilla) Wax, Beeswax, Dimethicone
