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Minipress (Prazosin)

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Minipress is an effective strong preparation which is taken in treatment of hypertension diseases. Minipress is also helpful in treatment of male prostate enlargement symptoms, congestive heart failure, Raynaud's disease. Minipress acts as anti-hypertension remedy.

Other names for this medication:

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Also known as:  Prazosin.


Minipress is created by pharmacy specialists to combat hypertension disease. Target of Minipress is to control level of blood pressure.

Minipress acts as anti-hypertension remedy. Minipress operates by reducing blood pressure.

Minipress is also known as Prazosin, Prazopress, Vasoflex, Hypovase.

Minipress is alpha blocker.

Generic name of Minipress is Prazosin (oral).

Brand name of Minipress is Minipress.


You should take it by mouth with water.

It is better to take Minipress 2-3 times a day at the same time with meals or milk.

It is better to start the first Minipress dose when are going to bed.

If you want to achieve most effective results do not stop taking Minipress suddenly.


If you overdose Minipress and you don't feel good you should visit your doctor or health care provider immediately. Symptoms of Minipress overdosage: feeling lightheaded, rash, weakness, troublesome breathing, pruritus, swelling.


Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F) away from moisture, light and heat. Keep container tightly closed. Throw away any unused medicine after the expiration date. Keep out of the reach of children in a container that small children cannot open.

Side effects

The most common side effects associated with Minipress are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not take Minipress if you are allergic to Minipress components.

Be careful with Minipress if you're pregnant or you plan to have a baby, or you are a nursing mother.

Be careful with Minipress if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement.

Be careful with Minipress if you have allergies to medicines, foods, or other substances.

Be careful with Minipress if you have liver or kidney disease, heart failure, low blood pressure, narcolepsy, prostate cancer.

Be careful with Minipress if you take muscle relaxants as carisoprodol; anti-anxiety drugs as diazepam; anti-seizure drugs as carbamazepine; tranquilizers; sleep medicines as sedatives; antihistamines as diphenhydramine; verapamil; psychiatric medicines as tricyclic antidepressants (amitriptyline), phenothiazines (chlorpromazine); sexual function problems drugs as vardenafil, sildenafil, tadalafil; narcotic pain relievers as codeine; beta blockers as metoprolol, propranolol, atenolol.

Avoid machine driving.

Use Minipress with great care in case you want to undergo an operation (dental or any other).

Avoid alcohol.

Minipress can be not safety for elderly people.

Try to be careful with sunbeams. Minipress makes skin sensitive to sunlight. Protect skin from the sun.

Do not stop taking Minipress suddenly.

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The effect of arginine vasopressin (AVP) on the gastrointestinal (GI) transit and its possible mechanism were studied using charcoal meal test in mice. A dose related inhibitory effect was recorded. The effect appears to be independent of the time allowed between AVP administration and testing. The studies on the mechanism reveal that AVP acts without involving V1 and V2 vasopressin receptors. An almost complete reversal of the effect by physostigmine and potentiation by atropine indicate that AVP might act through an inhibition of the release of acetylcholine. However, the neural nicotinic receptors mechanisms do not seem to contribute since hexamethonium failed to modify the AVP action. Further, a partial antagonism by naloxone or prazosin pretreatment indicates that opioid and alpha 1 adrenergic systems also contribute to this action of AVP. However, the effect appears to be independent of alpha 2 and beta adrenergic systems since yohimbine and propranolol failed to modify the same.

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1. The role of putative neurotransmitters was investigated in morphine-induced Straub reaction (SR) in albino mice. 2. Apomorphine (15 mg/kg) was also effective in inducing SR. However, in a smaller dose (0.2 mg/kg) it blocked SR induced by morphine. 3. Morphine-induced SR was potentiated by tranylcypromine, reserpine (acute effect), imipramine and L-dopa and blocked by reserpine (chronic effect), alpha-methyldopa, pimozide, chlorpromazine, haloperidol and metoclopramide. Prazosin and clonidine partially blocked morphine SR in high doses. 4. Propranolol, yohimbine, cyproheptadine and atropine were ineffective in blocking morphine SR. 5. The results indicate that morphine SR is mediated through release of DA in the CNS which excites central D2 receptors. Activation of central alpha 1-adrenoceptors might also play a minor role.

minipress drug class

A role for parabrachial nucleus in cardiovascular regulation is suggested by evidence that electrical stimulation in this region elicits increase in heart rate and arterial pressure. We hypothesized that parabrachial nucleus may also be involved in control of coronary vasomotor tone. After beta-adrenergic receptor blockade in anesthetized cats, electrical stimulation in the region of parabrachial nucleus produced no change in heart rate, an increase in arterial pressure (34 +/- 6 mmHg), and a transient reduction in coronary blood flow velocity (-21 +/- 2%). Coronary resistance (72 +/- 9%) and femoral resistance (189 +/- 31%) increased markedly. The decrease in coronary blood flow velocity was abolished by stellate ganglionectomy or alpha 1-adrenergic blockade without altering pressor or femoral responses. Injection of the neurotransmitter L-glutamate or kainic acid into parabrachial nucleus also elicited coronary vasoconstriction. We conclude that electrical or chemical activation in the region of parabrachial nucleus elicits coronary vasoconstriction as part of a generalized sympathetic activation. The fact that the coronary response is elicited by chemical activation suggests that cell bodies in the region of medial parabrachial nucleus and subceruleus, as opposed to fibers of passage, are involved in this central neural coronary vasoconstriction.

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Eight days after coarctation mean aortic pressure proximal to the occlusion was 168(SEM 1.29) mm Hg (n = 104) while distally it was 38(2.42) (n = 40). Of the rings tested 96% showed spontaneous rhythmic activity, having a mean frequency of 3.94(0.17) cycles.min-1. Spontaneous activity was not present in the pressure protected segments taken from the same animals. Rats with the distal kidney removed (n = 25) failed to become hypertensive and similarly prepared ring segments failed to show spontaneous rhythmic activity. Prior removal of the endothelial layer had no effect on the spontaneous contractile responses in pressure loaded segments. Histological examination showed that the media to lumen ratio was increased in coarcted rats in both pressure loaded and pressure protected regions compared to similar regions in sham operated animals.

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A rabbit ear model has been developed in which arterial pressure, auricular blood flow conductance, and microvascular perfusion can be followed continuously in conscious animals. Conductance is measured with a transit-time flow probe placed around the auricular artery, arterial pressure is measured with an abdominal aortic catheter, and cutaneous microvascular perfusion is assessed using laser Doppler fluxmetry. Placement of a femoral vein catheter permits administration of vasoactive substances. To date, rabbits have been instrumented for 90 days or longer. Auricular and abdominal arterial pressures were equal, permitting the calculation of auricular artery conductance. Microvascular perfusion as measured by laser Doppler fluxmetry followed changes in overall blood flow. The presence of postsynaptic alpha 2-receptors was confirmed by determining auricular conductance before and after the administration of intravenous alpha-agonists. The development of this unique model will help to advance the understanding of the pathophysiology of human digital thermoregulatory vascular abnormalities.

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To compare the efficacy and tolerability of the alpha 1 A-subtype selective drug tamsulosin with the nonsubtype-selective agent alfuzosin in the treatment of patients with lower urinary tract symptoms (LUTS) suggestive of bladder outlet obstruction (BOO), often termed symptomatic benign prostatic hyperplasia (BPH).

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The aim of the present study was to investigate the presence of the immunoreactive oxytocin in human placental extracts and putative factors regulating the release of immunoreactive oxytocin from cultured human placental cells. Fresh placental tissue was collected from pregnant women at term and dissected of membranes (n = 5). Presence of immunoreactive oxytocin in trophoblast tissue was evaluated by a specific radio-immunoassay after acidic extraction and high-pressure liquid chromatography. In a second set of experiments, primary cultures of placental cells were performed and, 48-72 h after dissociation, the effect of arginine vasopressin, corticotropin-releasing factor, neuropeptide Y, activin A, inhibin A, noradrenaline or prostaglandins on immunoreactive oxytocin level in culture medium was investigated. The presence of immunoreactive oxytocin was shown in the acidic extract of trophoblast at term, and in the culture medium of human placental cells, and it was identical to the native peptide. The addition of corticotropin-releasing factor or arginine vasopressin, but not of neuropeptide Y, increased the release of immunoreactive oxytocin three- to fourfold from placental cells, with a dose-dependent effect (P < 0.01). A significantly increased release of immunoreactive oxytocin was shown in presence of noradrenaline (P < 0.01), which was reversed by prazosin, an antagonist of alpha-adrenergic receptors. Recombinant human activin A (P < 0.01), but not inhibin A, stimulated the release of immunoreactive oxytocin three- to fourfold from placental cells. Prostaglandin F2 alpha was a potent secretagogue of immunoreactive oxytocin, whereas a partial or no effect was observed when prostaglandin E2 or prostaglandin I2 was added. Thus, the present findings showed that human placenta contains immunoreactive oxytocin, and that its release from cultured placental cells is regulated by neurohormones, growth factors or prostaglandins.

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minipress nightmares dosage 2016-03-17

1. The subtypes of alpha buy minipress (1)- and alpha(2)-adrenoceptor mediating contractions of vas deferens have been examined in wild-type and alpha(2A/D)-adrenoceptor knockout mice. 2. Maximum contractions to noradrenaline but not phenylephrine were significantly greater in vas from wild-type. The alpha(1A)-adrenoceptor antagonist RS100329 (5-methyl-3-[3-[4-[2-(2,2,2,-trifluoroethoxy)phenyl]-1-piperazinyl]propyl]-2,4-(1H)-pyrimidinedione) (10 nM) significantly shifted the potency of noradrenaline. The alpha(2D)-adrenoceptor antagonist BRL 44408 (2-[(4,5-dihydro-1H-imidazol-2-yl)methyl]-2,3-dihydro-1-methyl-1H-isoindole) significantly reduced the maximum contraction to noradrenaline in wild-type but not in knockout. 3. Following prazosin (0.1 micro M), a component of the contraction to noradrenaline in wild-type but not in knockout was sensitive to the alpha(2)-adrenoceptor antagonist yohimbine. 4. Nifedipine (10 micro M) or suramin (100 micro M) reduced the contraction to 10 Hz stimulation for 4 s to an early peak and small maintained response. The peak was abolished by the alpha(1)-adrenoceptor antagonist prazosin. 5. RS100329 or prazosin inhibited 10 Hz stimulation evoked contractions with a U-shaped concentration-response curve: inhibiting responses up to 0.1 micro M, with a reversal of inhibition above this concentration. In the presence of suramin or nifedipine, the reversal of inhibition by high concentrations of prazosin was reduced. 6. The alpha(1D)-adrenoceptor selective antagonist BMY7378 (8-[2-(4-(2- methoxyphenyl)piperazin-1-yl)ethyl]-8-azaspiro[4,5]decane-7,9-dione) produced inhibition of 10 Hz evoked contractions only in high concentrations. 7. In conclusion, contractions to nerve stimulation in mouse vas deferens involve largely alpha(1A)-adrenoceptors and purinoceptors. alpha(1)-Adrenoceptor antagonists in high concentrations increase the purinergic response presumably by blocking prejunctional alpha(2)-adrenoceptor-mediated inhibition. In the presence of nifedipine, responses are predominantly alpha(1)-adrenoceptor mediated. Contractions to exogenous noradrenaline involved both alpha(1A)- and alpha(2A/D)-adrenoceptors in wild-type mice.

minipress medication 2017-01-05

Agonist-induced sequestration and internalization of alpha 1-adrenergic receptors were examined in DDT1 MF-2 cells. Pretreatment of cells with epinephrine or norepinephrine alone, but not with phorbol 12-myristate 13-acetate alone, resulted in a marked decrease in [3H]prazosin binding to intact cells at 4 degrees. These pretreatments resulted in little or no change in the fraction of alpha 1-adrenergic receptors exhibiting limited accessibility to the hydrophilic competing ligand epinephrine in short-time competition binding assays with intact cells and little or no change in the subcellular distribution of alpha 1-adrenergic receptors between the plasma membrane and light vesicle compartments as assessed by sucrose density gradient centrifugation assays. Pretreatment with a combination of agonist plus phorbol 12-myristate 13-acetate resulted in a greater decrease in [3H]prazosin binding at 4 degrees than was observed when cells were pretreated with agonist alone, induced the conversion of about half of cell surface alpha 1-adrenergic receptors to a form exhibiting limited accessibility to epinephrine in short-time assays, and induced a shift of about half of alpha 1-adrenergic receptors from the plasma membrane fraction to a light vesicle fraction on sucrose density gradients. A similar shift of alpha 1-adrenergic receptors was observed on sucrose density gradients after exposure to agonist plus either mezerein or beta-phorbol didecanoate, but not with agonist plus alpha-phorbol didecanoate, indicating involvement of protein kinase C. These results suggest that pretreatment with agonist alone induces the sequestration of alpha 1-adrenergic receptors into a compartment that is inaccessible to [3H]prazosin at 4 degrees but that is accessible to hydrophilic ligands at 37 degrees and remains associated with the plasma membrane. In contrast, alpha 1- buy minipress adrenergic receptors are apparently internalized from the plasma membrane to a separate compartment, presumably an intracellular vesicle, when cells are pretreated simultaneously with a combination of agonist plus a protein kinase C activator.

minipress tablets 2015-11-06

Serotonin (5-HT)(1A) receptor agonists have been reported to produce mydriasis in mice, and miosis in rabbits and humans. However, the underlying mechanisms for this action are unclear. This study was undertaken in an attempt to explore the mechanism by which 5-HT(1A) receptors are involved in the modulation of pupillary size in pentobarbital-anesthetized rats. Intravenous administration of the 5-HT(1A) receptor agonist, (2R)-(+)-8-hydroxy-2-(di-n-propylamino)tetralin hydrobromide (8-OH-DPAT; 0.003-3 mg/kg), elicited dose-dependent pupillary dilation, which was not affected by section of the preganglionic cervical sympathetic nerve. 8-OH-DPAT-elicited mydriatic responses were attenuated by the selective 5-HT(1A) receptor antagonist, N-[2-[4-(2-methoxyphenyl)-1-piperazinyl]ethyl]-N-2-pyridinylcyclohexanecarboxamide maleate (WAY 100635; 0.3-1 mg/kg, i.v.), as well as by the selective alpha(2)-adrenoceptor antagonist, (8aR,12aS,13aS)-5,8,8a,9,10,11,12,12a,13,13a-dechydro-3-methoxy-12-(ethylsulfonyl)-6H-isoquino[2,1-g][1,6]naphthyridine hydrochloride (RS 79948; 0.3 mg/kg, i.v.), but not by the selective alpha(1)-adrenoceptor antagonist, prazosin (0.3 mg/kg, i.v.). Mydriatic responses elicited by the alpha(2)-adrenoceptor agonist, guanabenz (0.003-0.3 mg/kg, i.v.), were not antagonized by WAY 100635 (0.3-1 mg/kg, i.v.). To determine whether central nervous system (CNS) 5-HT(1A) receptors, like alpha(2)-adrenoceptors, are involved in reflex mydriasis, voltage response curves of pupillary dilation were constructed by stimulation of the sciatic nerve in anesthetized rats. WAY 100635 (1 mg/kg, i.v.) did not antagonize the evoked reflex mydriasis, which, however, was blocked by RS 79948 (0.3 mg/kg, i.v.). Taken together, these results suggest that 8-OH-DPAT produces pupillary dilation in anesthetized rats by stimulating CNS 5-HT(1A) receptors, which in turn trigger the release of Levitra Ed Medication norepinephrine, presumably from the locus coeruleus. The latter reduces parasympathetic neuronal tone to the iris sphincter muscle by stimulation of postsynaptic alpha(2)-adrenoceptors within the Edinger-Westphal nucleus. Unlike alpha(2)-adrenoceptors, 5-HT(1A) receptors in the CNS do not mediate reflex mydriasis evoked by sciatic nerve stimulation.

minipress drug information 2015-02-04

At diagnosis BCRP activity was undetectable in AML blasts from 23/26 cases, while Pgp activity was present in 36/45 and MRP activity in 26 Zanaflex Online /44 of the cases. Furthermore, no subpopulations of blasts with considerably higher drug efflux capacities were found. Overall, no consistent changes were observed at follow-up [during chemotherapy (n=20), MRD (n=37), relapse (n=26))] in forty-five patients, the mean activities (as percentages of values at diagnosis) were 97% (Pgp), 103% (MRP) and 102% (BCRP).

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To investigate the Stromectol 3mg Tablets changes of vasoconstriction and vasodilatation under different temperature conditions and the protective effects of Vitamin E (Vit E) against endothelial injury induced by hypothermia.

minipress dosage forms 2017-08-27

Rabbit or rat isolated tracheae were incubated in vitro, and the release of 5-hydroxytryptamine (5-HT) and its metabolite 5-hydroxyindoleacetic acid (5-HIAA) was determined by HPLC with electrochemical detection Cymbalta 60mg Cost . Release of 5-HT from rabbit tracheae could be evoked by the calcium ionophore A 23187 and, in a calcium-dependent manner, by depolarizing concentrations of potassium (45 mmol/l), but not by the mast cell degranulating drug compound 48/80. High potassium- and A 23187-evoked release of 5-HT was markedly higher from tracheae of newborn compared to adult rabbits. In rabbit tracheae, mechanical removal of the mucosa resulted in 80-90% reduction in tissue 5-HT and in a similar reduction in high potassium-evoked 5-HT release. 5-Hydroxytryptophan, but not tryptophan, caused a marked increase in the spontaneous outflow of 5-HT and 5-HIAA from tracheae of newborn rabbits, and the effect on 5-HT, but not that on 5-HIAA, required an intact mucosa. Furthermore, treatment with 5-hydroxytryptophan caused an increase in tissue 5-HT and 5-HIAA, and these effects required an intact mucosa. In tracheae of adult rabbits 5-hydroxytryptophan caused similar, although less profound, effects. Adrenaline (1 micromol/1) enhanced the release of 5-HT from newborn rabbit tracheae, and this effect was inhibited by 1 micro mol/l phentolamine or 1 micromol/1 prazosin, but not affected by 100 nmol/1 propranolol. In rat tracheae, compound 48/80 evoked a large release of 5-HT, whereas depolarizing concentrations of potassium (45 mmol/1) had only a very minor effect. In rat tracheae, 5-hydroxytryptophan had small effects on the outflow and tissue contents of 5-HT and 5-HIAA in comparison to the effects on rabbit tracheae; and removal of the mucosa resulted in only a minor reduction in tissue 5-HT. In conclusion, neuroendocrine epithelial (NEE) cells and mast cells are the major source of 5-HT in tracheae of the rabbit and rat, respectively. Isolated tracheae of newborn rabbits appear to be a useful model to study 5-HT secretion from NEE cells. 5-HT secretion from NEE cells is activated by a rise in intracellular calcium, and calcium influx through voltage-regulated channels appears to be one activating pathway. 5-HT secretion from NEE cells can be stimulated via alpha-adrenoceptors.

minipress xl dose 2017-03-04

We investigated the mechanism of alpha(1)-adrenoceptor stimulation on the myofibrillar Ca(2+) responsiveness at steady-state in intact rat ventricular myocytes. We produced tetanus, and an instantaneous plot of [Ca(2+)](i) vs. cell length (Ca-L trajectory) was constructed to estimate the Ca(2+) responsiveness. An alpha(1)-agonist, phenylephrine, dose-dependently shifted the Ca-L trajectory to the left, Depakote Max Dosage corresponding to sensitization of the myofilaments. An alpha(1)-antagonist, prazosin, and inhibition of the Na/H exchange by ethylisopropylamiloride (EIPA) completely reversed the phenylephrine-induced shift. Phenylephrine increased pH(i) (DeltapH(i) = +0.1), which was reversed by prazosin and EIPA. Chelerythrine, an inhibitor of protein kinase C (PKC), completely blocked the effects of phenylephrine on Ca(2+) responsiveness and pH(i). When pH(i) was increased (DeltapH(i) = +0.1) without phenylephrine by changing pH(o), the Ca-L trajectory was shifted to the same extent as that observed with phenylephrine. We conclude that alpha(1)-adrenoceptor stimulation activates Na/H exchange through a PKC-mediated pathway and that an increase in pH(i) is mainly responsible for the increase in Ca(2+) responsiveness.

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The alpha 1-adrenoceptor subtypes in ventral and dorsal horns of rat lumbar spinal cord were studied. High concentrations of the alpha 1D-adrenoceptor antagonist, BMY 7378 (8-[2-[4-(2-methoxyphenyl) 1-piperazinyl]ethyl]-8-azaspiro[4.5]decane-7,9-dione dihydrochloride), displaced bound [3H]prazosin in a single-site manner and the binding affinity was close to those for alpha 1A- and alpha 1B-adrenoceptor binding sites. 5-Methyl-urapidil displaced bound [3H]prazosin in a two site manner and the high and low affinities were close to those of alpha 1A- and alpha 1B-adrenoceptor binding sites, respectively. The alpha 1-adrenoceptor subtype populations of ventral and dorsal horns did not differ. The alpha 1A- and alpha 1B-adrenoceptor Cefixime Drug Interactions populations comprised 70% and 30%, respectively, of the total and very few alpha 1D-adrenoceptors were detected.