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TABLE 1 Studies of Antagonist Activity in Constitutively Active
TABLE 1 Studies of antagonist activity in constitutively active receptors systems shown to demonstrate inverse agonism for at least one ligand Targets are natural Gs and constitutively active mutants (CAM) of GPCRs. Of 380 antagonists, 85% of the ligands demonstrate inverse agonism. Receptor Neutral Antagonist Inverse Agonist Reference Human β2-adrenergic Dichloroisoproterenol, pindolol, labetolol, timolol, Chidiac et al., 1996; Azzi et alprenolol, propranolol, ICI 118,551, cyanopindolol al., 2001 Turkey erythrocyte β-adrenergic Propranolol, pindolol Gotze et al., 1994 Human β2-adrenergic (CAM) Propranolol Betaxolol, ICI 118,551, sotalol, timolol Samama et al., 1994; Stevens and Milligan, 1998 Human/guinea pig β1-adrenergic Atenolol, propranolol Mewes et al., 1993 Human β1-adrenergic Carvedilol CGP20712A, metoprolol, bisoprolol Engelhardt et al., 2001 Rat α2D-adrenergic Rauwolscine, yohimbine, WB 4101, idazoxan, Tian et al., 1994 phentolamine, Human α2A-adrenergic Napthazoline, Rauwolscine, idazoxan, altipamezole, levomedetomidine, Jansson et al., 1998; Pauwels MPV-2088 (–)RX811059, RX 831003 et al., 2002 Human α2C-adrenergic RX821002, yohimbine Cayla et al., 1999 Human α2D-adrenergic Prazosin McCune et al., 2000 Rat α2-adrenoceptor MK912 RX821002 Murrin et al., 2000 Porcine α2A adrenoceptor (CAM- Idazoxan Rauwolscine, yohimbine, RX821002, MK912, Wade et al., 2001 T373K) phentolamine Human α2A-adrenoceptor (CAM) Dexefaroxan, (+)RX811059, (–)RX811059, RS15385, yohimbine, Pauwels et al., 2000 atipamezole fluparoxan, WB 4101 Hamster α1B-adrenergic -
Inline-Supplementary-Material-1.Pdf
Appendix 1: STOPP/START criteria version 2 applied to the TRUST dataset Physiological system Criteria Criteria included Number (%) (The relevant () criteria for each participant were applied to the dataset and recorded in of Microsoft Office Excel ® (2013)) criteria included out of total criteria STOPP criteria Indication of medication A1. Any drug prescribed without an evidence-based clinical indication. X 1/3 (33.3) A2. Any drug prescribed beyond the recommended duration, where treatment duration is X well defined. A3. Any duplicate drug class prescription e.g. two concurrent NSAIDs, SSRIs, loop diuretics, ACE inhibitors, anticoagulants (optimisation of monotherapy within a single drug class should be observed prior to considering a new agent). Cardiovascular system B1. Digoxin for heart failure with preserved systolic ventricular function (no clear evidence X 7/13 (53.8) of benefit). B2. Verapamil or diltiazem with NYHA Class III or IV heart failure (may worsen heart failure). B3. Beta-blocker in combination with verapamil or diltiazem (risk of heart block). B4. Beta blocker with symptomatic bradycardia (< 50/min), type II heart block or complete heart block (risk of profound hypotension, asystole). B5. Amiodarone as first-line antiarrhythmic therapy in supraventricular tachyarrhythmias X (higher risk of side-effects than beta-blockers, digoxin, verapamil or diltiazem). B6. Loop diuretic as first-line treatment for hypertension (safer, more effective alternatives available). B7. Loop diuretic for dependent ankle oedema without clinical, biochemical evidence or radiological evidence of heart failure, liver failure, nephrotic syndrome or renal failure (leg elevation and /or compression hosiery usually more appropriate). B8. Thiazide diuretic with current significant hypokalaemia (i.e. -
Imidazoline Antihypertensive Drugs: Selective I1-Imidazoline Receptors Activation K
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by FarFar - Repository of the Faculty of Pharmacy, University of Belgrade REVIEW Imidazoline Antihypertensive Drugs: Selective I1-Imidazoline Receptors Activation K. Nikolic & D. Agbaba Faculty of Pharmacy, Institute of Pharmaceutical Chemistry, University of Belgrade, Vojvode Stepe, Belgrade, Serbia Keywords SUMMARY α2-Adrenergic receptors; Centrally acting antihypertensives; Clonidine; Hypertension; Involvement of imidazoline receptors (IR) in the regulation of vasomotor tone as well as in Imidazoline receptors; Rilmenidine. the mechanism of action of some centrally acting antihypertensives has received tremen- dous attention. To date, pharmacological studies have allowed the characterization of three Correspondence main imidazoline receptor classes, the I1-imidazoline receptor which is involved in central K. Nikolic, Faculty of Pharmacy, Institute of inhibition of sympathetic tone to lower blood pressure, the I2-imidazoline receptor which Pharmaceutical Chemistry, University of is an allosteric binding site of monoamine oxidase B (MAO-B), and the I3-imidazoline re- Belgrade, Vojvode Stepe 450, 11000 Belgrade, ceptor which regulates insulin secretion from pancreatic β-cells. All three imidazoline re- Serbia. ceptors represent important targets for cardiovascular research. The hypotensive effect of + Tel: 381-63-84-30-677; clonidine-like centrally acting antihypertensives was attributed both to α2-adrenergic re- + Fax: 381-11-3974-349; ceptors and nonadrenergic I1-imidazoline receptors, whereas their sedative action involves E-mail: [email protected] activation of only α2-adrenergic receptors located in the locus coeruleus. Since more selec- tive I1-imidazoline receptors ligands reduced incidence of typical side effects of other cen- trally acting antihypertensives, there is significant interest in developing new agents with higher selectivity and affinity for I1-imidazoline receptors. -
Letters to the Editor
Letters to the Editor Letters to the Editor Need for a New Framework to Understand lactin levels were high (115 mg/L; normal range, 12–30 mg/L). the© MechanismCopyright of All Antipsychotics 2000 PhysiciansAttempts Postgraduate to reduce dosage below Press, 80 mg/day resultedInc. in relapse, with good recovery when dosage was restored. Sir: The advent of atypical neuroleptics has transformed the A SPECT study was performed using a dual-headed camera pharmacologic treatment of schizophrenia. The advent of single and 185 MBq of 123-Iodobenzamide (IBZM). The specific-to- photon emission computed tomography (SPECT) and positron nonspecific binding ratio was measured at 90 minutes postinjec- emission tomography (PET) neuroreceptor imaging makes it tion. The SPECT was performed a week after a PET analysis possible to link biochemical events in the human brain to their was kindly performed in Dr. Kapur’s laboratory while the pa- clinical consequences. Remington and Kapur1 (supplement 10, tient received 90 mg/day of haloperidol. No detectable recep- 1999) have proposed an interesting model based on studies us- tors at this dosage were found with either technique. ing PET that takes in account the serotonin-2/dopamine-2 Our findings lead us to wonder whether there exists a sub- group of chronic patients resistant to conventional and some (5-HT2/D2) occupancy threshold: conventional antipsychotics atypical neuroleptics in normal doses, but who may respond have low 5-HT2/high D2 ratios, olanzapine and risperidone have well to conventional neuroleptics in high doses. Despite a high high 5-HT2/high D2 ratios, clozapine has a high 5-HT2/low D2 2,3 One personal copy maylevel be of printed striatal D occupancy, our patient did not present with ratio, and quetiapine has a low 5-HT2/low D2 ratio. -
Alpha^ and Beta^Blocking Agents: Pharmacology and Properties
CURRENT DRUG THERAPY DONALD G. VIDT, MD AND ALAN BAKST, PharmD, EDITORS Alpha^ and beta^blocking agents: pharmacology and properties PROFESSOR B.N.C. PRICHARD • Adrenergic receptors have been separated into alpha and beta groups, which have then been further subdivided. Agents have been developed that block each type of receptor with varying degrees of specificity between the sub-types, leading to differences in pharmacodynamic profile. A more recent innovation has been the development of multiple action beta-blocking drugs, ie, those not only blocking the beta receptors but also posessing a peripheral vasodilator effect that may be due to alpha blockade, beta-2 stimulation, or a vasodilator action independent of either alpha or beta receptors. • INDEX TERMS: ALPHA BLOCKERS; BETA BLOCKERS; HYPERTENSION • CLEVE CLIN ] MED 1991; 58:33 7-350 HE CONCEPT that binding of Rosenblueth suggested that a transmitter released at catecholamines to receptors leads to differ- sympathetic nerve endings produced either inhibitory ing responses was first described by Langley, or excitatory responses as a result of combination with who in 1905 noted that a cell may make sympathin I or sympathin E at the receptor.3 Tmotor or inhibitory substances or both, and that "the The current classification of alpha and beta respon- effect of a nerve impulse depends upon the proportion ses is based on the classic work of Ahlquist,4 who of the two kinds of receptive substance which is af- studied six sympathomimetic amines and found two fected by the impulse."1 In 1906, Dale reported that patterns of reactivity. One group of actions, mediated ergot blocked the excitatory but not the inhibitory ac- by what were termed "alpha receptors," were principally tions of adrenaline.2 In 1933, Cannon and excitatory. -
Pharmacologyonline 2: 971-1020 (2009) Newsletter Gabriella Galizia
Pharmacologyonline 2: 971-1020 (2009) Newsletter Gabriella Galizia THE TREATMENT OF THE SCHIZOPHRENIA: AN OVERVIEW Gabriella Galizia School of Pharmacy,University of Salerno, Italy e-mail: [email protected] Summary The schizophrenia is a kind of psychiatric disease, characterized by a course longer than six months (usually chronic or relapsing), by the persistence of symptoms of alteration of mind, behaviour and emotion, with such a seriousness to limitate the normal activity of a person. The terms antipsychotic and neuroleptic define a group of medicine principally used to treat schizophrenia, but they are also efficacious for other psychosis and in states of psychic agitation. The antipsychotics are divided into two classes: classic or typical and atypical. The paliperidone, the major metabolite of risperidone, shares with the native drug the characteristics of receptoral bond and of antagonism of serotonin (5HT2A) and dopamine (D2). It's available in a prolonged release formulation and it allows the administration once daily. Besides, the paliperidone has a pharmacological action independent of CYT P450 and in such way a lot of due pharmacological interactions would be avoided to interference with the activity of the CYP2D6, that is known to have involved in the metabolism of the 25% of the drugs of commune therapeutic employment. Introduction The schizophrenia has been a very hard disease to investigate by the research. This is not surprising because it involves the most mysterious aspects of human mind, as emotions and cognitive processes. According to scientific conventions, the schizophrenia is a kind of psychiatric disease, characterized by a course longer than six months (usually chronic or relapsing), by the persistence of symptoms of alteration of mind, behaviour and emotion, with such a seriousness to limitate the normal activity of a person. -
Adrenoceptor Subtype 1Ian Marshall, Richard P
Brifish Journal of Pharmacology (I995) 115, 781 - 786 1995 Stockton Press All rights reserved 0007-1188/95 $12.00 X Noradrenaline contractions of human prostate mediated by aClA- (cxlc) adrenoceptor subtype 1Ian Marshall, Richard P. Burt & *Christopher R. Chapple Department of Pharmacology, University College London, Gower Street, London WC1E 6BT and *Department of Urology, The Royal Hallamshire Hospital, Glossop Road, Sheffield SlO 2JF 1 The subtype of a1-adrenoceptor mediating contractions of human prostate to noradrenaline was characterized by use of a range of competitive and non-competitive antagonists. 2 Contractions of the prostate to either noradrenaline (pD2 5.5), phenylephrine (pD2 5.1) or methoxamine (pD2 4.4) were unaltered by the presence of neuronal and extraneuronal uptake blockers. Noradrenaline was about 3 and 10 times more potent than phenylephrine and methoxamine respectively. Phenylephrine and methoxamine were partial agonists. 3 Pretreatment with the alkylating agent, chlorethylclonidine (10-4 M) shifted the noradrenaline concentration-contraction curve about 3 fold to the right and depressed the maximum response by 31%. This shift is 100 fold less than that previously shown to be produced by chlorethylclonidine under the same conditions on OlB-adrenoceptor-mediated contractions. 4 Cumulative concentration-contraction curves for noradrenaline were competitively antagonized by WB 4101 (pA2 9.0), 5-methyl-urapidil (pA2 8.6), phentolamine (pA2 7.6), benoxathian (pA2 8.5), spiperone (pA2 7.3), indoramin (pA2 8.2) and BMY 7378 (pA2 6.6). These values correlated best with published pKi values for their displacement of [3H]-prazosin binding on membranes expressing cloned oczc-adrenoceptors and poorly with values from cloned lb- and cld-adrenoceptors. -
Potential Drug-Drug Interactions and Adverse Drug Reactions Associated with Hydroxychloroquine
Original Article Potential Drug-drug Interactions and Adverse Drug Reactions Associated with Hydroxychloroquine Arjun Singh1, Richa Chaudhary1, Prayas Verma2, Nilanchal Trivedi3,*, Md. Shamim4 1Department of Pharmacy Practice, Teerthanker Mahaveer College of Pharmacy, TMU, Moradabad, Uttar Pradesh, INDIA. 2Teerthanker Mahaveer Dental College and Research Centre, TMU Moradabad, Uttar Pradesh, INDIA. 3Department of Pharmacology, Teerthanker Mahaveer College of Pharmacy, TMU, Moradabad, Uttar Pradesh, INDIA. 4LCP College of Pharmacy Baghpat, Abdul Kalam Technical University (AKTU), Uttar Pradesh, INDIA. ABSTRACT Introduction: COVID-19 is a pandemic disaster and a health emergency of prime focus for all the world economies. Various prophylactic treatments are considered to combat the disease. Hydroxychloroquine drug is one such option that is given much attention as an armor against SARS COV-2 pandemic. Evaluation and assessment of drug interactions and ADRs is required from ethical concern to justify the use of HCQ on such large scale. Methods: We have performed an analysis of HCQ drug interactions on Micromedex®. We have reviewed literature of HCQ pharmacokinetic properties, ADRs/ ADEs and toxicities associated with the use of HCQ drug on PubMed, Google Scholar and CDC database. Results: There are around 180 drug interactions possible with HCQ. Out of them 13 are of contraindicated severity level and other 165 are of major severity and 2 of them are moderately severe. Most of the interactions are coupled with QT prolonging agents (170), Cardiac arrhythmias is possible with the concomitant use of at least 2 drugs, 4 drugs leads to Torsade de points. System organ level ADRs are also evaluated along with various precautions, warnings and contraindications. -
Effects of Centrally Acting Antihypertensive Drugs on the Microcirculation of Spontaneously Hypertensive Rats
Brazilian Journal of Medical and Biological Research (2004) 37: 1541-1549 Effects of rilmenidine on microcirculation 1541 ISSN 0100-879X Effects of centrally acting antihypertensive drugs on the microcirculation of spontaneously hypertensive rats V. Estato1, 1Departamento de Fisiologia e Farmacodinâmica, Instituto Oswaldo Cruz, C.V. Araújo1, FIOCRUZ, Rio de Janeiro, RJ, Brasil P. Bousquet2 and 2Laboratoire de Neurobiologie et Pharmacologie Cardiovasculaire, E. Tibiriçá1 Faculté de Médecine, Université Louis Pasteur, Strasbourg, France Abstract Correspondence We investigated the acute effects of centrally acting antihypertensive Key words E. Tibiriçá drugs on the microcirculation of pentobarbital-anesthetized spontane- • Mesenteric microcirculation Departamento de Fisiologia e ously hypertensive rats (SHR). The effects of the sympatho-inhibitory • Arterial hypertension Farmacodinâmica • Clonidine agents clonidine and rilmenidine, known to activate both α2-adreno- Instituto Oswaldo Cruz, FIOCRUZ • Rilmenidine ceptors and nonadrenergic I1-imidazoline binding sites (I1BS) in the Av. Brasil, 4365 • central nervous system, were compared to those of dicyclopropyl- Baclofen 21045-900 Rio de Janeiro, RJ • LNP 509 Brasil methyl-(4,5-dimethyl-4,5-dihydro-3H-pyrrol-2-yl)-amine hydrochlo- Fax: +55-21-2598-4451 ride (LNP 509), which selectively binds to the I1BS. Terminal mesen- E-mail: [email protected] teric arterioles were observed by intravital microscopy. Activation of the central sympathetic system with L-glutamate (125 µg, ic) induced Research supported by CNPq and marked vasoconstriction of the mesenteric microcirculation (27 ± 3%; FAPERJ, as well as FIOCRUZ N = 6, P < 0.05). In contrast, the marked hypotensive and bradycardic (Fundação Oswaldo Cruz). effects elicited by intracisternal injection of clonidine (1 µg), rilmeni- dine (7 µg) and LNP 509 (60 µg) were accompanied by significant increases in arteriolar diameter (12 ± 1, 25 ± 10 and 21 ± 4%, Received January 21, 2004 respectively; N = 6, P < 0.05). -
Antihypertensive Agents Using ALZET Osmotic Pumps
ALZET® Bibliography References on the Administration of Antihypertensive Agents Using ALZET Osmotic Pumps 1. Atenolol Q7652: W. B. Zhao, et al. Stimulation of beta-adrenoceptors up-regulates cardiac expression of galectin-3 and BIM through the Hippo signalling pathway. British Journal of Pharmacology 2019;176(14):2465-2481 Agents: Isoproterenol; propranolol; carvedilol; atenolol; ICI-118551 Vehicle: saline; ascorbic acid, buffered; Route: SC; Species: Mice; Pump: 2001; Duration: 1 day; 2 days; 7 days; ALZET Comments: Dose ((ISO 0.6, 6, 20 mg/kg/d), (Prop 2 mg/kg/d), (Carv 2 mg/kg/d), (AT 2 mg/kg/d), (ICI 1 mg/kg/d)); saline with 0.4 mM ascorbic acid used; Controls were non-transgenic and received mp w/ vehicle; animal info (12-16 weeks, Male, (C57BL/6J, beta2-TG, Mst1-TG, or dnMst1-TG)); ICI-118551 is a beta2-antagonist with the structure (2R,3S)-1-[(7-methyl-2,3-dihydro-1H-inden-4-yl)oxy]-3-(propan-2-ylamino)butan-2-ol; cardiovascular; Minipumps were removed to allow for washout of ISO overnight prior to imaging; Q7241: M. N. Nguyen, et al. Mechanisms responsible for increased circulating levels of galectin-3 in cardiomyopathy and heart failure. Sci Rep 2018;8(1):8213 Agents: Isoproterenol, Atenolol, ICI-118551 Vehicle: Saline, ascorbic acid; Route: SC; Species: Mice; Pump: Not Stated; Duration: 48 Hours; ALZET Comments: Dose: ISO (2, 6 or 30 mg/kg/day; atenolol (2 mg/kg/day), ICI-118551 (1 mg/kg/day); 0.4 mM ascorbic used; animal info (12 14 week-old C57Bl/6 mice); cardiovascular; Q6161: C. -
Use of Antipsychotic Drugs and Lithium in Mania
BRITISHJOURNAL OF PSYCHIATRY %20%2001), 01), 178 %suppl. 41), s14s148^ 8^ s156 Use of antipsychotic drugs and lithium in mania experience over the following 30 years indi- cated that lithium is far short of an ideal treatment, even when administered expertly JOHN COOKSON to `concordant' patients. There is a striking difference between the results of early con- trolled trials and the outcome on lithium in open clinical practice, where a smaller pro- portion of patients appear to be `lithium re- sponders'; some even doubt the validity of the clinical trials %Moncrieff, 1997). The benefits of lithium therapy have to be balanced against the difficulties in its Background Studies highlighting the Mania or a manic episode is a severe phase management ± with poor compliance in pa- difficulties associated withlithium suggest in the course of bipolar disorders, the con- tients with bipolar disorder and the occur- dition termed `manic±depressive illness' by rence of withdrawal mania ± and the risks that the role of antipsychotic drugs and Kraepelin in the 19th century. A contem- of side-effects and toxicity %Cookson, mood stabilisersin bipolardisorder should porary textbookdescribed the difficulty of 1997). The latter includes the possibility be reconsidered. managing a patient with mania ± using of permanent neurological sequelae with drugs of limited efficacy, mainly sedative cerebellar damage %Schou, 1984). Aims Toreview the efficacyandmode or anaesthetic, such as chloral and ur- Since the 1970s anticonvulsant drugs, of action of antipsychotic drugsin mania, ethane, or potentially toxic drugs, such as first carbamazepine and more recently and to consider the differences between potassium bromide. The sedative anticon- valproate and, in open studies, lamotrigine officialguidelines and routine clinical vulsant paraldehyde was also used. -
Update on Rilmenidine: Clinical Benefits
AJH 2001; 14:322S–324S Update on Rilmenidine: Clinical Benefits John L. Reid Rilmenidine is an imidazoline derivative that appears to consistent with a reduction in long-term cardiovascular lower blood pressure (BP) by an interaction with imida- risk, as would recently described actions on the heart zoline (I1) receptors in the brainstem (and kidneys). Ril- (reducing left ventricular hypertrophy) and the kidney menidine is as effective in monotherapy as all other first- (reducing microalbuminuria). Although no data are yet Downloaded from https://academic.oup.com/ajh/article/14/S7/322S/137317 by guest on 28 September 2021 line classes of drugs, including diuretics, -blockers, available from prospective long-term outcome studies, angiotensin converting enzyme (ACE) inhibitors, and cal- rilmenidine could represent an important new develop- cium antagonists. It is well tolerated and can be taken in ment in antihypertensive therapy and the prevention of combination for greater efficacy. Sedation and dry mouth cardiovascular disease. Am J Hypertens 2001;14:322S–324S are not prominent side effects and withdrawal hyperten- © 2001 American Journal of Hypertension, Ltd. sion is not seen when treatment is stopped abruptly. Recently, in addition to a reduction in BP, this agent Key Words: Blood pressure, rilmenidine, imidazoline, insu- has been shown to improve glucose tolerance, lipid risk lin resistance, metabolic syndrome, microalbuminuria, ventricu- factors, and insulin sensitivity. These changes would be lar hypertrophy, end-organ damage. n spite of major developments during the past 50 included in the treatment choice of several key outcome years, there is still no single ideal antihypertensive trials (Veterans Administration [VA] trials and European I drug.