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Lector prof. Posokhova K.A.
Anatomy-physiological peculiarities of vegetative nervous system. Anticholinesterase drugs Lector prof. Posokhova K.A.
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Efferent nervous fibres supply
skeletal muscles – somatic; regulate funtions of internal organs vegetative Synaps - is a place of contact of long fibre ending (axon) of one neuron with a body of other one or cell of active organ (effector cell)
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Cholinergic synaps
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Influence of parasympathetic and sympathetic nervous system on function of organs
Eye m. sphincter pupillae m. dilatator pupillae m. ciliaris contraction (miosis) absent innervation contraction (close sight) contraction (midriasis) dilation (far sight) Heart Excitability Conduction Power of contractions Frequency of contraction dicreasing slowing down increasing speeding up Vessels Skin, mucous membranes Mesentraium, organs of abdominal cavity Skeletal muscles Heart, brain ’’ - dilation - ’’ - contraction ’’ – - ’’ – Bronchi Circular muscles Glandular secretion contractoin decreasing Stomach, intestines Perystaltics Tonus of sphyncters decresing Urinary bladder Detrusor Sphyncter Glands (secretion) Salivary Sweat incresing (liquid secret, large quantity) increasing (small quantity)
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Cholinergic nervous fibres are:
1) preganglionic (sympoathetic and parasypmathetic); 2) all postgnglionic parasympathetic; 3) postganglionic sympathetic which supply sweat glands and vessels of skeletal muscles; 4) somatic nerves; 5) nerves which supply adrenal medulla and carotic sinuses; 6) neurons of CNS Adrenergic nervous fibres are: 1) postganglionic sympathetic, except those which supply sweat glands and vessels of skeletal muscles; 2) neurons of CNS
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Cholinergic drugs 1) M-, N-cholinomimetics (acetylcholine, carbacholine); 2) Anticholinesterase drugs – cholinesterase inhibitors (proserin, galanthamine hydrobromide, pirydostygmine bromide, armine); 3) M-, N- cholinoblockers (amisyl, cyclodol); 4) M-cholinomimetics (pilocarpin, aceclidyn); 5) M-cholinoblockers (atropine sulphate, platyphyllin hydrotartrate, scopolamine hydrobromide, metacinum); 6) N-cholinomimetics (cytyton, lobelin); 7) N-cholinoblockers: а) ganglionblockers (benzohexonium, pentamin, hygronium, arphonade); б) myorelaxants (tubocurarinum chloride, dytylinum, melliktin)
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M-, N-cholinomimetics Acetylcholine Carbacholine
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Carbacholine 0,5-1 % solutions of carbacholine - eye drops for treatment of glaucoma The drug is never used orally and with injections because of its consideralbe toxicity !
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M-, N-cholinoblockers Amizyl Cyclodol
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Amizyl Indications for administration
neurotic disorders, Parcinoson’s disease and other extrapyramidal disorders, for premedication before narcosis, for diseases which are accompanied with spasm of smooth muscles, for dilation of pupil in ophtalmology The drug is administered orally 0,001-0,002 g 3-4 times per day, as eye dropps % solution is used Side effects : dryness of mucous membranes, tachycardia, dilation of pupils, disturbances of accomodation. The drug is contraindicated in case of glaucoma!
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medicamentous parcinsonism
Cyclodol Anticholinergic drug, preferably blocks central N-cholinoreceptors and peripheral M-cholinoreceptors Usage Parcіnson’s disease, medicamentous parcinsonism
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Anticholinesterase drugs
Proserinum, Galanthamini hydrobromidum, Armin, Pirydostygmini bromidum
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Indications for administration overdosing with M-cholinoblockers
Proserinum Proserinum is an anticholinesterase drug of reverse action, its effect lasts for 2,5-4 hours. Indications for administration Impairment of nerve conduction after polyomyelitis, paralysis, neurities, traumas overdosing with M-cholinoblockers
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Galanthamini hydrobromidum Indications for administration
Duration of action of Galanthamini hydrobromidum is longer than of Proserinum, that’s why it can be administered 1-2 times per day Indications for administration Impairment of nerve conduction after polyomyelitis, paralyses, neuritis, traumas, overdosing with M-cholinoblockers
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Pirydostigmini bromide (calimin)
Usage myastenia gravis after traumas, neuryties, paralyses in a period of recovery after polyomyelitis, encephalitis
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Anticholinesterase drugs are
contraindicated in cases of epilepsia, hyperkinesias, bronchial asthma, stenocardia, bradycardia
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Acute poisoning with anticholinesterase drugs (POC)
nausea, vomiting, diarrhea, abdominal pain quick contraction of pupils, disturbance of visus (spasm of accomodation) increasing of salivation and sweating bronchospasm tachy- or bradicardia seizures, excitement, loss of consciousness, coma Death is caused by breath insufficiency, bronchospasm and lungs edema
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Treatment of acute poisoning
Treatment should be started immediately (WHO) stomach lavage with solution of Sodium hydrocarbonate salt laxatives, enterosorbents siphon enema the poison should be carefully washed away from the skin forced diuresis, in complicated cases - hemosorbtion, hemodialysis Usage of antagonist is necessary!!! – atropine sulphate. It should be introduced intravenously repeatedly, 2-4 ml of 0,1 % solution with the interval of 5-10 minutes. Appearance of tachycardia, dilation of pupils, dryness in the mouth are the criteria of sufficiency of atropine sulfate dose. Also reactivators of cholinesterase which renew activity of this enzyme are administered – dipyroxym, alloxym, isonitrosyn
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Treatment of acute poisoning
Depending on severity of poisoning dipyroxym is introduced once or a few times. An average dose of the drug in heavy cases is 3-4 ml of 15 % solution. The total dose of alloxym is 0,4-1,6 g (0,075 g every 1-3 hours). If necessary - artificial ventilation should be performed to a patient. And after symptomatic treatment is carried on.
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M-cholinergic drugs
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M-cholinomimetics M-cholinoblockers
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Pilocarpini hydrochloridum
M-cholinomimetics Pilocarpini hydrochloridum Aceclidinum
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Рilocarpini hydrochloridum
Pharmacodinamics Contraction of pupil, improvement of outflow of intraocular liquid and relief intraocular pressure Dilation of eye vessels Usage Treatment of glaucoma Improvement of eye nutrition in a case of thrombosis of retinal central vein, acute obstruction of retinal arteries, optic nerve atrophy Systemic (resorbtive) action of the drug is not used because of its high toxicity. The most dangerous manifestation of poisoning with pilocarpinum is edema of lungs
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Pilocarpine causes constriction of pupils (myosis)
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Aceclidinum Pharmacodinamics Usage treatment of glaucoma
Miosis, decrease of intraocular pressure, spasm of accomodation Increase of tonus and peristalsis of smooth muscles of digestive tract organs, urinary bladder Increase of tonus of uterus and bronchial muscles Usage treatment of glaucoma prophylaxis and treatment of postoperative atony of stomach, intestines, urinary bladder stopping of post delivery uterus bleedings The drug is contraindicated in case of bronchial asthma, pregnancy, ischemic heart disease
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Acute poisoning with substances of M-cholinomimetic action (overdosing of drugs, consumption of mushrooms of Inocibe family) Clinical signes diarrhea, stomachache contraction of pupils, disorders of accomodation increasing of salivation, vomiting disorders of breathing because of bronchial spasm confusion, consciousness, seizures, coma Treatment measures for organism purifying form poison intravenous introduction of 0,1 % Atropine sulfate solution – 2 ml every 10 min. (until appearance of dryness in mouth and dilation of pupils) symptomatic treatment
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mushrooms of Inocybe family
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M-cholinoblockers Atropine sulfate Scopolamine hydrobromide
Platyphyllin hydrotartrate Metacinum Dry extract of Belladonna
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Pharmacokinetics and usage of M-cholinoblockers
Influence on an eye Dilation of a pupil (midriasis) Increasing of intraocular pressure Paralysis of accomodation (cycloplegia) Midriasis and cycloplegia stay for: atropine – 7-11 days, gomatropine – 1-2 days, platyphyllin – 5-6 hours, scopolamine – 4-5 days Usage Investigation of orbital fundum (posterior chamber of eye) Prevention of synechia (comissures) in case of trauma and operations on eye Contraindication glaucoma
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Pharmacodynamics and usage of M-cholinoblockers
Decreasing of function of excretory glands, except mammal glands Decreasing of tonus and peristaltic of smooth muscles of digestive tract, bronchi, urinary tract Usage Ulcer disease of stomach and duodenum (gastrocepin) Liver, renal, intestinal colics Dyskinesias of gastrointestinal tract, enteritis, colitis Cystitis Bronchial spasm (Ipratropii bromide - atrovent)
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Other cases of M-cholinoblockers administration
Holding of atropine test in case of atrioventricular blockade (atropine) In anesthesiologia for premedicatoin – for prevention of bronchial and laryngeal spasm, syncope, limitation of salivary and bronchial glands secretion (atropine, scopolamine, metacinum) Poisoning with M-cholinomimetics and POC (atropine) Seasickness (scopolamine, aeronum)
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Gastrozepin (Gastrocepinum)
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Side effects of M-chlinoblockers
Dryness of mucous membranes, dysphagia, dysphonia Tachycardia Increasing of intraocular pressure, glaucoma attack Constipation, retention of urine (ischuria) Formation of bronchial plugs in patients with bronchial asthma Overheating M-cholinoblockers are absolutely contraindicated in patients with glaucoma
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Acute poisoning with substances of M-cholinoblocking action
Causes Overdosing with drugs of M-cholinoblockers group Consumption of plants, which include alcaloids of this group
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Belladonna
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Datura stramonium
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Symptoms of acute poisoning with M-cholinoblockers
“Atropine psychosis”: delirium, hallucinations, disorientation, psychomotor excitement Redness and dryness of skin, increasing of body temperature Dryness of mucous membranes causes disorders of swallowing (dysphagia), speech (dysartria, raleness of voice) Thirst Quick dilation of pupils (midriasis) Photophobia Visus disorders (Paralysis of accomodation) Tachycardia Atony of intestines Retention of urine Death is caused by paralysis of breath center
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TREATMENT OF ACUTE POISONING WITH M-CHOLINOBLOCKERS
wash out of stomach with 0,5 % Tannin solution, laxative agents, sorbents, forced diuresis Specific antagonists – anticholinesterase drugs: repeated introduction of proserinum, galantaminum, hydrobromidum until symptoms of disappearance of M-cholinoblockers blockade removal of psychomotor excitement - aminasinum, sybazon, barbiturates removal of tachycardia – anapryline for relief of photophobia patient is put to a dark room for decreasing of body temperature ice-cube bottles are placed around the patient In case of considerable depressing of breathing - artificial ventilation with oxygen inhalation
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N-cholinergic drugs
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N-cholinomimetics Cytiton Lobelin hydrochloride
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Cytiton Pharmacodynamics Usage
increases tone of respiratory center of medulla oblongata reflectively increases arterial pressure due to reflective excitation of vascular-motor center Usage respiratory arrest due to inhalation of irritative substances, traumas, electro-shock, surgical operations morphine and CO poisoning shock and collapse conditions, depression of blood circulation and breathing in patients with infectious diseases
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Acute poisoning with nicotine
Clinical picture nausea, vomiting, salivation, abdominal pain, diarrhea, dizziness, headache, cold sweat, weakness, loosing of consciousness, tachy- or bradycardia, cardiac arrhythmias, seizures, breathing depression Death is caused by sharp depression of respiratory center and paralysis of breathing musculature
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Chronic poisoning with nicotine
Chronic diseases of respiratory system, Lung cancer and Malignant tumors of other localisation, Ischemic heart disease, Obliterating endarteritis, Gastric and duodenal ulcer disease Women Depression of female sex hormones production, yellow face, early wrinkles, damaging of teeth, harsh voice, sometimes male type hair growth Men Deep, nonreversible changes of spermatozoids
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N-cholinoblockers Ganglionblockers Myorelaxants
Benzohexonium, pentamin, hyhronium, pyrilen Myorelaxants Tubocurarine chloride, dithylin, mellictin
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Ganglionblockers
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PHARMACODYNAMICS Dilation of peripheral vessels
Decreasing of blood pressure Decreasing of smooth musculature tone of internal organs (bronchi, GI tract, urinary and bile tracts) Decreasing of glandular secretion: bronchial, gastric, salivary
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Benzohexonium Usage Hypertensive crisis Guided (controlled) hypotonia
Does nor penetrate through hemato-encephalic (blood-brain) barrier. Duration of action varies from 3 to 6 hours Usage Hypertensive crisis Guided (controlled) hypotonia Obliterating endarteritis Spasm of peripheral vessels Intestinal, hepatic, kidney colics Gastric ulcer Bronchial asthma, lung emphysema, lung edema
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Duration of action– 2-4 hours
Pentaminum Duration of action– 2-4 hours Usage Hypertensive crisis Obliterating endarteritis Spasm of peripheral vessels Intestinal, hepatic, nephral colic Gastric ulcer Bronchial asthma, lung emphysema
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Hygronium Effect develops after 2-3 min, and lasts for min after stopping of infusion Usage For controlled hypotonia For treatment of nephropathy and eclampsia For complex therapy of hypertensive crisis, brain edema, lung edema
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Side effects and complications of ganglioblockers’ administration
Orthostatic collapse Dryness of mucous membranes Disturbance of accomodation General weakness Dizziness Tachycardia Atonia of urinary bladder, intestines (paralytic ileus)
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Myorelaxants
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Tubocurarine chloride, anatruxonium, pipecuronium bromide, mellictin
Antidepolarizing type of action (pachicurare) Tubocurarine chloride, anatruxonium, pipecuronium bromide, mellictin Depolarizing type of action (leptocurare) dithylinum
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Sequence of relaxation of striped muscles
Small muscles of fingers,toes, ears, eyes, head, neck, muscles of extremities, trunc, Intercostal muscles and diaphragm Reviving of tone is performed in reversed sequence
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1 2 3 4 5 6 7
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Tubocurarine chloride
Relaxation begins after 1-1,5 min after introduction and lasts for min Usage For prolonged relaxation of striped muscles during surgical operations For relaxation of muscles while repositioning fractured bones and combined dislocations For prevention of traumatic injuries during seizure therapy of schizophrenia, during epileptic status, seizures of other ethiology (tetanus) PROSERINE is introduced to abolish action of the drug
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(suxamethonium, succinilcholin, listenon)
Dithylinum (suxamethonium, succinilcholin, listenon) Myorelaxation develops after sec. Total restoring of muscle tonus comes after 5-10 min. Usage before such manipulations as tracheal intubation, broncho- and esophagoscopia, cystoscopia for reposition of bone fractures, dislocations
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Insufficiency of buthyrilcholinesterase (genetic pathology)
In this pathology action of dithylinum can last for several hours, and all this time the patient should be connected to artificial respiration device TREATMENT Introduction of fresh-citrate blood Direct blood infusion from donnor Introduction of buthyrilcholinesterase
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All myorelaxants are contraindicated for patients with myastenia
Mellictin Usage For disease and syndrome of Parkinson, postencephalitic parkinsonism, disease of Little, spinal arachnoiditis, arachnoencephalitis All myorelaxants are contraindicated for patients with myastenia
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ADRENERGIC DRUGS
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which act in adrenergic synapses
Adrenergic drugs medical substances which act in adrenergic synapses
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Adrenergic synaps
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Typical localization of adrenal receptors and changes of functions observed during stimulation of these receptors Smooth muscles of vessels: skin mucsous membranes mesentery , organs of abdominal cavity skeletal muscles coronary lungs kidneys veins 1 2 Д1 Contraction of vessels - ’’ - - ’’ - Dilation of vessles M dillatator pupillae Ciliary muscle Heart 1 Midriasis (dilation of pupil) Dilation (far vision) Increasing of power and frequency of contraction, conductivity, automatism Bronchial muscles Bronchial glands 1, 2 Dilation of bronchi Decreasing of secretion, increasing of secretion Smooth musculature of GI tract: walls - sphincters 2, 2 Decreasing of tone, peristaltic Increasing of tone Smooth musculature of urinary bladder: sphincters Relaxation Contraction Liver Decomposition of glycogen Uterus (pregnant>not pregnant) Salivary glands Increasing of К+ , f amylase and Н2О secretion Sweat glands Increasing of secretion Insulin secretion 2 Decreasing Increasing Presynaptic formations of adrenergic neurons Decreasing of releasing of nor-adrenalin into synaptic split Stimulation of releasing of nor-adrenalin into synaptic split Presynaptic formations of cholinergic neurons Stimulation of releasing of acetyl-choline into synaptic split
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б) adrenomimetics of indirect action or sympathomimetics
а) adrenomimetics of direct action б) adrenomimetics of indirect action or sympathomimetics Adrenoblockers or adrenolytics Sympatholytics
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ІІ. Sympathomimetics (ephedrine) ІІІ. Adrenoblockers
І. Adrenomimetics 1. - і -adrenomimetics (adrenalin hydrochloride, noradrenalin hydrotartrate) 2. dopamine-, -, -adrenomimetics (dopamine) 3. -adrenomimetics (mesatone, naftizin, galazoline) 4. -adrenomimetics (isadrine, salbutamol, phenoterol, terbutalin, dobutamine) ІІ. Sympathomimetics (ephedrine) ІІІ. Adrenoblockers 1. -adrenoblockers (phentolamine, tropaphen, prasosine, pyroxan) 2. -adrenoblockers (anaprilin, athenolol, talinolol, acebutolol) 3. - і -adrenoblockers (labetalol) ІІІ. Sympatholytics (reserpine, octadine)
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Adrenomimetics
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adrenaline hydrochloride
Adrenalin (epinephrine) is a hormone of medulla of suprarenal glands which is used in a form of a remedy adrenaline hydrochloride It is an adrenomimetic which stimulates 1,- 2- and 1,- 2-adrenoreceptors Administration Cardiac arrest, for example, during surgical general anesthesia, electric trauma shock (anaphylactic shock) and collapse of different origine bronchial spasm hypoglycemic coma treatment of open-angle glaucoma
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Noradrenalin hydrotartrate (norepinephrine)
Is an adrenomimetic of direct action which stimulates 1-, 2- and 1-adrenal receptors Administration in cases of acute decreasing of blood pressure - shock and collapse conditions, surgeries, traumas The drug is absolutely contraindicated for subcutaneous and intramuscular introductions
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Necrosis
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Dopamine shock and collapse Drug of a first choice for treatment of
of different aetiology, including cardiogenic and hemorrhagic
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Mesaton (phenylefrin)
Is a synthetic a1-adrenomimetic drug of direct action Administration acute hypotensive conditions, prophylaxis of decreasing of blood pressure in case of infectious diseases, poisonings, decreasing of blood pressure during narcosis with halothan and cyclopropan nose drops in case of rhinitis
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Naphthysin Xylometazolin
are a2-adrenomimetics of direct action Usage for rhinitis in a form of nose drops – 1-2 drops 2-3 times a day It is not recommended for chronic cold
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NAPHAZOLIN
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Isadrin (isoprenalin, novodrin, euspiran)
– is a synthetic katecholamine, which is a strong stimulant of β1- і β2-adrenoreceptors Administration bradycardia, atrio-ventricular blockade bronchial spasm complex therapy of some kinds of shock (if the patient doesn’t have hypovolemia) Side effects nausea, hands tremor, dry mouth, in patients with ischemic heart disease – acute ischemic attack, heavy cardiac tachyarrhythmias, even fibrillation of ventricles
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Salbutamol (ventolin)
selective b2-adrenomimetic of direct action Administration inhalations during attacks of bronchial asthma and bronchial spasms of other etiology premature child delivery, rapid (vigorous) child delivery
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Terbutalin (brikanil) and phenoterol (berotek, partusisten)
are stimulants of mostly 2-adrenal receptors. They posses broncholytic and tokolytic activity
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Dobutamin Is a synthetic 1-adrenomimetic
Cardiotonic effects of dobutamin is 5 times stronger than action of dopamine Administration some forms of acute and chronic cardiac insufficiency intravenous dropping infusion with the speed of 2,5-10 mcg / (kg.min)
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Sympathomimetics
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Ephedrine hydrochloride (Ephedrini hydrochloridum)
It is an alkaloid of plants of Ephedra family, which has indirect α-, β-adrenomimetic (sympathomimetic) action Administration collapse conditions, for prophylaxis of decreasing of blood pressure before spinal anesthesia, infectious diseases treatment of rhinitis (2 %, 3 % solution as nose drops). prophylaxis and elimination of bronchial spasm (inhalations 0,5 %-1 % solutions of drug) SIDE EFFECTS agitation, excitement, tremor, inconsiderable euphoria, insomnia, seizures drug addiction tachyphylaxy
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Adrenoblockers
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Alfa-adrenoblockers
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Phentolamine, tropaphen
are synthetic 1, 2-аdrenoblockers administration diagnostics and symptomatic treatment of feochromocytoma disturbances of peripheral blood circulation in case of endarteriitis, Reino’s disease, trophic ulcers, decubitus complex treatment of hypertensive crises, acute cardiac insufficiency complex therapy of hypovolemic and cardiogenic shock
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Selective 1- adrenoblocker
Prasosin Selective 1- adrenoblocker Administration treatment of arterial hypertension Side effects “phenomenon of first dose”: sudden decreasing of blood pressure and even development of orthostatic collapse after first administrations of the drug Prophylaxis: administration of half-dose before sleep
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Beta-adrenoblockers
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Anaprilin Administration arterial hypertension
Is a β1- і β2-adrenoblocker Administration ischemic heart disease arterial hypertension cardiac tachyarrhythmias acute myocardium infarction
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Talinolol or cordanum Administration is a cardioselective
β-adrenoblocker Administration disorders of cardiac rhythm (extrasystolies, paroxysmal tachycardia, fibrillation and scintillation of atria) ischemic heart disease arterial hypertension .
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Atenolol (tenormin) arterial hypertension cardiac arrhythmias
cardioselelctive -adrenoblocker with long duration of action Indications for administration ischemic heart disease arterial hypertension cardiac arrhythmias acute myocardium infarction
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1-adrenoblocker with inner sympathomimetic activity
Acebutolol (sectral) 1-adrenoblocker with inner sympathomimetic activity Indications disorders of cardiac rhythm (tachyarrhythmias) hypertension ischemic heart disease
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Labetolol Contraindications
-, -adrenoblocker. The drug blocks 1, 2, 1 and 2-adrenoreceptors Administration treatment of patients with arterial hypertension hypertensive crisis Contraindications Atrio-ventricular blockade, cardiac insufficiency
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increase the production of NO in blood vessels
CARVEDILOL, NEBIVOLOL increase the production of NO in blood vessels are used now for chronic cardiac insufficiency (congestive heat failure)
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Sympatholytics
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Reserpin Administration Side effects fatigue, somnolence, depression,
is a sum of Rauvolfia (plant) alkaloids. Maximal hypotensive action develops after 5-7 days of regular administration of the drug. After the treatment coarsed effect can still stay for two weeks. Administration treatment of different forms of essential hypertension (drugs of a second row, second line) (combined drugs trirezid, cristepin, adelfan, brinerdin) Side effects manifestations of parkinsonism fatigue, somnolence, depression, bradycardia increasing of motor and secretory activity of gastro-intestinal tract, acute attacks of ulcer disease, diarrhea swelling of nose mucous membrane with complication of nose breathing
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Octadin Is a sympatholytic with strong hypotensive effect. During administration of the drug decreasing of blood pressure develops gradually, after 2-3 days. After abolition of drug administration the effect still stays for 2 weeks. Administration heavy forms of arterial hypertension Side effects general weakness, nausea, vomiting, swelling of nose mucous membrane, diarrhea, liquid retention in the organism, orthostatic collapse
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