Photosensitivity usually causes a rash on skin exposed to sunlight.
This often occurs because a photosensitizer (such as some drugs, dyes, chemicals in perfumes and soaps, and plants such as mustard) has been ingested or applied to the skin.
Photosensitivity is also a feature of disorders such as systemic lupus erythematosus.
People who are susceptible to photosensitivity reactions should avoid exposure to sunlight and photosensitizers, and use sunscreens.
Habitat: The Himalayas from Kashmir to West Bengal at 9003,000 m, and in Arunachal Pradesh, Nagaland and Meghalaya.
English: Agrimony, Stickle Wort.Unani: Ghaafis.Folk: Belu.Action: Astringent, anti- inflammatory, hepatic, cholagogue, diuretic, mild haemostatic, antibacterial. Used for irritations and infections of the intestinal tract, gallbladder diseases, hyperacidity, colic, urinary disorders (bed- wetting, incontinence), sluggish liver, mucus membrane inflammations; externally for ulcerated and discharging skin, psoriasis and seborrhoic eczemas.
Key application: In mild, nonspecific, acute diarrhoea and in inflammation of oral and pharyngeal mucosa; as astringent. (German Commission E, The British Herbal Pharmacopoeia.)The herb contains condensed tannins up to 8%, coumarins, flavonoids (glucosides of luteolin, apigenin and quercetin), polysaccharides, volatile oil. Luteolin 7-glucoside shows a chole- gogic action. Aqueous extracts inhibited Mycobacterium tuberculosis, also strains resistant to streptomycin and p-aminosalicylate. Essential oil is antibacterial, active against Bacillus sub- tilis.The ethanolic extracts of the herb are used for their antiviral properties. (Natural Medicines Comprehensive Database, 2007.)Coumarins interact with anticoagulants, and drugs that increase the risk of bleeding Furanocoumarin content increase photosensitivity. (Sharon M. Herr.)... agrimonia eupatoriaNutritional Profile Energy value (calories per serving): Low Protein: Moderate Fat: Low Saturated fat: Low Cholesterol: None Carbohydrates: High Fiber: Moderate Sodium: High Major vitamin contribution: Folate Major mineral contribution: Potassium, phosphorus
About the Nutrients in This Food Celery has moderate amounts of dietary fiber and small amounts of the B vitamin folate. One-half cup diced raw celery has one gram dietary fiber and 17 mcg folate (4 percent of the R DA).
The Most Nutritious Way to Serve This Food Fresh, filled with cheese to add protein.
Diets That May Restrict or Exclude This Food Low-fiber diet Low-sodium diet
Buying This Food Look for: Crisp, medium-size pale green celery with fresh leaves. Darker stalks have more vitamin A but are likely to be stringy. Avoid: Wilted or yellowed stalks. Wilted stalks have lost moisture and are low in vitamins A and C. Yellowed stalks are no longer fresh; their chlorophyll pigments have faded enough to let the yellow carotenes show through. Avoid bruised or rotten celery. Celery cells contain chemicals called furocoumarins (pso- ralens) that may turn carcinogenic when the cell membranes are damaged and the furocou- marins are exposed to light. Bruised or rotting celery may contain up to a hundred times the psoralens in fresh celery.
Storing This Food Handle celery carefully to avoid damaging the stalks and releasing furocoumarins. Refrigerate celery in plastic bags or in the vegetable crisper to keep them moist and crisp. They will stay fresh for about a week.
Preparing This Food R inse celery under cold running water to remove all sand and dirt. Cut off the leaves, blanch them, dry them thoroughly, and rub them through a sieve or food mill. The dry powder can be used to season salt or frozen for later use in soups or stews.
What Happens When You Cook This Food When you cook celery the green flesh will soften as the pectin inside its cells dissolves in water, but the virtually indestructible cellulose and lignin “strings” on the ribs will stay stiff. If you don’t like the strings, pull them off before you cook the celery. Cooking also changes the color of celery. Chlorophyll, the pigment that makes green vegetables green, is very sensitive to acids. When you heat celery, the chlorophyll in its stalks reacts chemically with acids in the celery or in the cooking water to form pheophytin, which is brown. The pheophytin will turn the celery olive-drab or, if the stalks have a lot of yellow carotene, bronze. You can prevent this natural chemical reaction and keep the celery green by cooking it so quickly that there is no time for the chlorophyll to react with the acids, or by cooking it in lots of water (which will dilute the acids), or by cooking it with the lid off the pot so that the volatile acids can float off into the air.
Adverse Effects Associated with This Food Contact dermatitis. Celery contains limonene, an essential oil known to cause contact der- matitis in sensitive individuals. (Limonene is also found in dill, caraway seeds, and the peel of lemon and limes.) Photosensitivity. The furocoumarins (psoralens) released by damaged or moldy celery are photosensitizers as well as potential mutagens and carcinogens. Constant contact with these chemicals can make skin very sensitive to light, a problem most common among food work- ers who handle large amounts of celery without wearing gloves. Nitrate/nitrite poisoning. Like beets, eggplant, lettuce, radish, spinach, and collard and turnip greens, celery contains nitrates that convert naturally into nitrites in your stomach and then react with the amino acids in proteins to form nitrosamines. Although some nitro- samines are known or suspected carcinogens, this natural chemical conversion presents no known problems for a healthy adult. However, when these nitrate-rich vegetables are cooked and left to stand at room temperature, bacterial enzyme action (and perhaps some enzymes in the plants) convert the nitrates to nitrites at a much faster rate than normal. These higher-nitrite foods may be hazardous for infants; several cases of “spinach poison- ing” have been reported among children who ate cooked spinach that had been left standing at room temperature.... celery
Seborrhoeic dermatitis is a red, scaly, itchy rash that develops on the face, scalp, chest, and back. The rash often develops during times of stress and is probably caused by an excess growth of yeast on the skin. Corticosteroid drugs and/or drugs that kill microorganisms may help. Contact dermatitis results from a reaction to some substance that comes
in contact with the skin. Common causes are detergents, nickel, certain plants, and cosmetics. It may be treated with topical corticosteroids. A patch test (see skin tests) may be done to identify the cause. Photodermatitis occurs in people whose skin is abnormally sensitive to light. A cluster of spots or blisters occurs on any part of the body exposed to the sun (see photosensitivity). dermatitis artefacta Any self-induced skin condition. It may range from a mild scratch to extensive mutilation. dermatitis herpetiformis A chronic skin disease in which clusters of tiny, red, intensely itchy blisters occur in a symmetrical pattern, most commonly on the back, elbows, knees, buttocks, and scalp. It usually develops in adult life and is believed to be related to coeliac disease. dermatology The branch of medicine concerned with the skin and its disorders. dermatome An area of skin supplied with nerves by a pair of spinal nerve roots from the cervical (C2–C8), thoraci.
(T1–T12), lumbar (L1–L5), and sacral (S1–S5) regions.
The entire body surface is an interlocking pattern of dermatomes, which is similar from one person to another.
Abnormal sensation in a dermatome signifies damage to a particular nerve root, commonly due to a disc prolapse.... dermatitis
When absorbed into the skin, psoralens react with ultraviolet light to cause skin darkening or inflammation.
Psoralen drugs may be used in conjunction with ultraviolet light (a combination called PUVA) to treat psoriasis and vitiligo.
Overexposure to ultraviolet light during treatment, or to too high a dose of a psoralen drug, may cause redness and blistering of the skin.
Psoralens in perfumes may cause photosensitivity.... psoralen drugs
Sulphonylureas The main group of hypoglycaemic agents, these act on the beta cells to stimulate insulin release; consequently they are e?ective only when there is some residual pancreatic beta-cell activity (see INSULIN). They also act on peripheral tissues to increase sensitivity, although this is less important. All sulphonylureas may lead to HYPOGLYCAEMIA four hours or more after food, but this is relatively uncommon, and usually an indication of overdose.
There are several di?erent sulphonylureas; apart from some di?erences in their duration or action (and hence in their suitability for individual patients) there is little di?erence in their e?ectiveness. Only chlorpropamide has appreciably more side-effects – mainly because of its prolonged duration of action and consequent risk of hypoglycaemia. There is also the common and unpleasant chlorpropamide/ alcohol-?ush phenomenon when the patient takes alcohol. Selection of an individual sulphonylurea depends on the patient’s age and renal function, and often just on personal preference. Elderly patients are particularly prone to the risks of hypoglycaemia when long-acting drugs are used. In these patients chlorpropamide, and preferably glibenclamide, should be avoided and replaced by others such as gliclazide or tolbutamide.
These drugs may cause weight gain and are indicated only if poor control persists despite adequate attempts at dieting. They should not be used during breast feeding, and caution is necessary in the elderly and in those with renal or hepatic insu?ciency. They should also be avoided in porphyria (see PORPHYRIAS). During surgery and intercurrent illness (such as myocardial infarction, COMA, infection and trauma), insulin therapy should be temporarily substituted. Insulin is generally used during pregnancy and should be used in the presence of ketoacidosis.
Side-effects Chie?y gastrointestinal disturbances and headache; these are generally mild and infrequent. After drinking alcohol, chlorpropamide may cause facial ?ushing. It also may enhance the action of antidiuretic hormone (see VASOPRESSIN), very rarely causing HYPONATRAEMIA.
Sensitivity reactions are very rare, usually occurring in the ?rst six to eight weeks of therapy. They include transient rashes which rarely progress to erythema multiforme (see under ERYTHEMA) and exfoliate DERMATITIS, fever and jaundice; chlorpropamide may also occasionally result in photosensitivity. Rare blood disorders include THROMBOCYTOPENIA, AGRANULOCYTOSIS and aplastic ANAEMIA.
Biguanides Metformin, the only available member of this group, acts by reducing GLUCONEOGENESIS and by increasing peripheral utilisation of glucose. It can act only if there is some residual insulin activity, hence it is only of value in the treatment of non-insulin dependent (type 2) diabetics. It may be used alone or with a sulphonylurea, and is indicated when strict dieting and sulphonylurea treatment have failed to control the diabetes. It is particularly valuable in overweight patients, in whom it may be used ?rst. Metformin has several advantages: hypoglycaemia is not usually a problem; weight gain is uncommon; and plasma insulin levels are lowered. Gastrointestinal side-effects are initially common and persistent in some patients, especially when high doses are being taken. Lactic acidosis is a rarely seen hazard occurring in patients with renal impairment, in whom metformin should not be used.
Other antidiabetics Acarbose is an inhibitor of intestinal alpha glucosidases (enzymes that process GLUCOSIDES), delaying the digestion of starch and sucrose, and hence the increase in blood glucose concentrations after a meal containing carbohydrate. It has been introduced for the treatment of type 2 patients inadequately controlled by diet or diet with oral hypoglycaemics.
Guar gum, if taken in adequate doses, acts by delaying carbohydrate absorption, and therefore reducing the postprandial blood glucose levels. It is also used to relieve symptoms of the DUMPING SYNDROME.... hypoglycaemic agents
There are many abnormalities of pigmentation.
Patches of pale skin occur in psoriasis, pityriasis alba, pityriasis versicolor, and vitiligo.
Albinism is caused by generalized melanin deficiency.
Phenylketonuria results in a reduced melanin level, making sufferers pale-skinned and fair-haired.
Areas of dark skin may be caused by disorders such as eczema or psoriasis, pityriasis versicolor, chloasma, or by some perfumes and cosmetics containing chemicals that cause photosensitivity.
Permanent areas of deep pigmentation, such as freckles and moles (see naevus), are usually due to an abnormality of melanocytes.
Acanthosis nigricans is characterized by dark patches of velvet-like, thickened skin.
Blood pigments may lead to abnormal colouring.
Excess of the bile pigment bilirubin in jaundice turns the skin yellow, and haemochromatosis turns the skin bronze.... pigmentation
Symptoms begin soon after ingestion and include restlessness, stiffness of the face and neck, increased sensitivity of hearing, taste, and smell, and photosensitivity, followed by alternating episodes of seizures and floppiness. Death may occur from respiratory arrest.
The victim is given intravenous injections of a tranquillizer or a barbiturate, with a muscle-relaxant drug if needed.
Breathing may be maintained by a ventilator.
With prompt treatment, recovery usually occurs in about 24 hours.... strychnine poisoning
Exposure to sunlight can affect the eyes, causing irritation of the conjunctiva, actinic keratopathy, or pterygium.
Good sunglasses help to prevent eye problems.... sunlight, adverse effects of
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