Compositions of hydroquinone and an aliphatic sulfoxide of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl, substituted alkyl, alkenyl, or hetero groups, along with appropriate pharmaceutical diluents, excipients, and/or adjuvants are disclosed. The preferred aliphatic sulfoxide is dimethyl sulfoxide, and the sulfoxide content can range between about 1 and 99 weight percent, preferably between about 25 and 90 weight percent. The hydroquinone content ranges between about 1 and 10 weight percent, preferably between about 1.5 and 5 weight percent.Also disclosed are various methods for preventing, eliminating, or substantially reducing post-inflammatory hyperpigmentation by applying these compositions to hyperpigmented tissue of hyman or animal subjects as often as necessry to remedy or alleviate the hyperpigmentation.

Methods for prevention of post-inflammatory hyperpigmentation

The present invention is a method of treating mammals for alleviating inflammation by utilization of a non-steroid topical agent. The agent is ethyl linoleate [ethyl-cis,cis(9,12)-octadecadienoate] which may be combined in a preferred formulation with one or more antioxidants such as .alpha.-tocopherol, d,l-histidine, and tertiary butyl hydroquinone; a stabilizer such as Tween-80; and inert esters such as ethyl oleate, ethyl palmitate, and ethyl stearate. The agent is applied in a therapeutic dosage range of 0.2-0.8 mg/cm.sup.2 of body surface both internal and external, with a preferred dosage of 0.5 mg/cm.sup.2. This topical remedy for inflammation for internal and external body surfaces is utilized principally in a single dose but may be utilized in multiple doses are required due to low toxicity (60:1). Among the conditions with inflammatory responses amenable to treatment are ultraviolet ratiation, solar radiation, non-infectious conjunctivitis, hemorrhoids (acute), abrasions, ingrown finger or toenail (granulation), skin graft donor sites, vaginitis, poison ivy, psoriasis, herpes simplex (cold sores, aphthous ulcers), pruritis ani/cruri, chemical inflammation, and insect stings/bites.

Non-steroid topical agent for alleviating inflammation in mammals

Treatment of post-inflammatory hyperpigmentation (PIH) in black and asian skin is accelerated from natural healing by use of a composition comprising a retinoid and/or an inhibitor of cytochrome P-450 enzyme-mediated degradation of retinoids, the composition does not require a conventional depigmenting or bleaching agent (such as a hydroquinone) as is typically used. Healing of PIH lesions is accelerated about three to five times from normal healing. Additionally, these compositions are useful separately for lightening black or asian skin.

Regents of the University of Michigan

Method of treating post-inflammatory hyperpigmentation in black skin with a retinoid, and method of lightening black skin with a retinoid

A composition comprising hydrated lipidic lamellar phases of liposomes containing a mulberry component. The composition may also contain kojic acid or its salts or esters, hydroquinone, or a mixture of kojic acid or its salts or esters and hydroquinone. This composition has skin-lightening properties or anti-inflammatory activity and has pharmaceutical and cosmetic applications. A method for lightening the skin or for applying anti-inflammatory formulation to the skin by applying to the skin a composition comprising hydrated lipidic lamellar phases or liposomes containing a mulberry component.

hydroquinone/infiammazione

Methods for prevention of post-inflammatory hyperpigmentation

Non-steroid topical agent for alleviating inflammation in mammals

Method of treating post-inflammatory hyperpigmentation in black skin with a retinoid, and method of lightening black skin with a retinoid

Composition containing a mulberry extract incorporated into hydrated lipidic lamellar phases of liposomes

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