Nhận Dạng Quốc Tế & Đặc Tính Hóa Học
Công thức hóa học
C19H23ClN2
Monoisotopic mass
314.154976453
InChI
InChI=1S/C19H23ClN2/c1-21(2)12-5-13-22-18-7-4-3-6-15(18)8-9-16-10-11-17(20)14-19(16)22/h3-4,6-7,10-11,14H,5,8-9,12-13H2,1-2H3
InChI Key
InChIKey=GDLIGKIOYRNHDA-UHFFFAOYSA-N
IUPAC Name
(3-{5-chloro-2-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,12,14-hexaen-2-yl}propyl)dimethylamine
Traditional IUPAC Name
clomipramine
SMILES
CN(C)CCCN1C2=CC=CC=C2CCC2=C1C=C(Cl)C=C2
Độ sôi
160-170 °C at 3.00E-01 mm Hg
pKa (Strongest Basic)
9.2
Refractivity
95.41 m3·mol-1
Dược Lực Học :
Clomipramine, a tricyclic antidepressant, is the 3-chloro derivative of Imipramine. It was thought that tricyclic antidepressants work exclusively by inhibiting the re-uptake of the neurotransmitters norepinephrine and serotonin by nerve cells. However, this response occurs immediately, yet mood does not lift for around two weeks. It is now thought that changes occur in receptor sensitivity in the cerebral cortex and hippocampus. The hippocampus is part of the limbic system, a part of the brain involved in emotions. Presynaptic receptors are affected: α1 and β1 receptors are sensitized, α2 receptors are desensitized (leading to increased noradrenaline production). Tricyclics are also known as effective analgesics for different types of pain, especially neuropathic or neuralgic pain.
Cơ Chế Tác Dụng :
Clomipramine, the 3-chloro analog of imipramine, is a dibenzazepine-derivative tricyclic antidepressant (TCA). TCAs are structurally similar to phenothiazines. They contain a tricyclic ring system with an alkyl amine substituent on the central ring. In non-depressed individuals, clomipramine does not affect mood or arousal, but may cause sedation. In depressed individuals, clomipramine exerts a positive effect on mood. TCAs are potent inhibitors of serotonin and norepinephrine reuptake. Tertiary amine TCAs, such as clomipramine, are more potent inhibitors of serotonin reuptake than secondary amine TCAs, such as nortriptyline and desipramine. TCAs also down-regulate cerebral cortical β-adrenergic receptors and sensitize post-synaptic serotonergic receptors with chronic use. The antidepressant effects of TCAs are thought to be due to an overall increase in serotonergic neurotransmission. TCAs also block histamine-H1 receptors, α1-adrenergic receptors and muscarinic receptors, which accounts for their sedative, hypotensive and anticholinergic effects (e.g. blurred vision, dry mouth, constipation, urinary retention), respectively. See toxicity section below for a complete listing of side effects. Clomipramine may be used to treat obsessive-compulsive disorder and disorders with an obsessive-compulsive component (e.g. depression, schizophrenia, Tourette’s disorder). Unlabeled indications include panic disorder, chronic pain (e.g. central pain, idiopathic pain disorder, tension headache, diabetic peripheral neuropathy, neuropathic pain), cataplexy and associated narcolepsy, autistic disorder, trichotillomania, onchophagia, stuttering, premature ejaculation, and premenstrual syndrome. Clomipramine is rapidly absorbed from the gastrointestinal tract and demethylated in the liver to its primary active metabolite, desmethylclomipramine.
Clomipramine is a strong, but not completely selective serotonin reuptake inhibitor (SRI), as the active main metabolite desmethyclomipramine acts preferably as an inhibitor of noradrenaline reuptake. α1-receptor blockage and β-down-regulation have been noted and most likely play a role in the short term effects of clomipramine. A blockade of sodium-channels and NDMA-receptors might, as with other tricyclics, account for its effect in chronic pain, in particular the neuropathic type.
Dược Động Học :
▧ Absorption :
Well absorbed from the GI tract following oral administration. Bioavailability is approximately 50% orally due to extensive first-pass metabolism. Bioavailability is not affected by food. Peak plasma concentrations occurred 2-6 hours following oral administration of a single 50 mg dose. The peak plasma concentration ranged from 56 ng/mL to 154 mg/mL (mean, 92 ng/mL). There are large interindividual variations in plasma concentrations occur, partly due to genetic differences in clomipramine metabolism. On average, steady state plasma concentrations are achieved in 1-2 weeks following multiple dose oral administration. Smoking appears to lower the steady-state plasma concentration of clomipramine, but not its active metabolite desmethylclomipramine.
▧ Volume of Distribution :
~ 17 L/kg (range: 9-25 L/kg).
Clomipramine is capable of distributing into the cerebrospinal fluid, the brain, and into breast milk.
▧ Protein binding :
Clomipramine is approximately 97-98% bound to plasma proteins, principally to albumin and possibly to α1-acid glycoprotein. Desmethylclomipramine is 97-99% bound to plasma proteins.
▧ Metabolism :
Extensively metabolized in the liver. The main active metabolite is desmethylclomipramine, which is formed by N-demethylation of clomipramine via CYP2C19, 3A4 and 1A2. Other metabolites and their glucuronide conjugates are also produced. Other metabolites of clomipramine include 8-hydroxyclomipramine formed via 8-hydroxylation, 2-hydroxyclomipramine formed via 2-hydroxylation, and clomipramine N-oxide formed by N-oxidation. Desmethylclomipramine is further metabolized to 8-hydroxydesmethylclomipramine and didesmethylclomipramine, which are formed by 8-hydroxylation and N-demethylation, respectively. 8-Hydroxyclomipramine and 8-hydroxydesmethylclomipramine are pharmacologically active; however, their clinical contribution remains unknown.
▧ Route of Elimination :
Urine (51-60%) and feces via biliary elimination (24-32%)
▧ Half Life :
Following oral administration of a single 150 mg dose of clomipramine, the average elimination half-life of clomipramine was 32 hours (range: 19-37 hours) and of desmethylclomipramine was 69 hours (range: 54-77 hours). Elimination half-life may vary substantially with different doses due to saturable kinetics (i.e. metabolism).
Độc Tính :
Signs and symptoms vary in severity depending upon factors such as the amount of drug absorbed, the age of the patient, and the time elapsed since drug ingestion. Critical manifestations of overdose include cardiac dysrhythmias, severe hypotension, convulsions, and CNS depression including coma. Changes in the electrocardiogram, particularly in QRS axis or width, are clinically significant indicators of tricyclic toxicity. In U.S. clinical trials, 2 deaths occurred in 12 reported cases of acute overdosage with Anafranil either alone or in combination with other drugs. One death involved a patient suspected of ingesting a dose of 7000 mg. The second death involved a patient suspected of ingesting a dose of 5750 mg.
Side effects include: sedation, hypotension, blurred vision, dry mouth, constipation, urinary retention, postural hypotension, tachycardia, hypertension, ECG changes, heart failure, impaired memory and delirium, and precipitation of hypomanic or manic episodes in bipolar depression.
Withdrawal symptoms include gastrointestinal disturbances, anxiety, and insomnia.
Chỉ Định :
May be used to treat obsessive-compulsive disorder and disorders with an obsessive-compulsive component (e.g. depression, schizophrenia, Tourette’s disorder).
Unlabeled indications include: depression, panic disorder, chronic pain (e.g. central pain, idiopathic pain disorder, tension headache, diabetic peripheral neuropathy, neuropathic pain), cataplexy and associated narcolepsy (limited evidence), autistic disorder (limited evidence), trichotillomania (limited evidence), onchophagia (limited evidence), stuttering (limited evidence), premature ejaculation, and premenstrual syndrome.
Tương Tác Thuốc :
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Altretamine
Risk of severe hypotension
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Artemether
Additive QTc-prolongation may occur. Concomitant therapy should be avoided.
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Atazanavir
Atazanavir may increase the effect and toxicity of the tricyclic antidepressant, clomipramine, by decreasing its metabolism. Monitor for changes in the therapeutic and adverse effects of clomipramine if atazanavir is initiated, discontinued or dose changed.
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Butabarbital
Barbiturates like butabarbital may increase the metabolism of tricyclic antidepressants like clomipramine. Monitor for decreased therapeutic effects of tricyclic antidepressants if a barbiturate is initiated/dose increased, or increased effects if a barbiturate is discontinued/dose decreased. The tricyclic antidepressant dosage will likely need to be increased during concomitant barbiturate therapy, and reduced upon barbiturate discontinuation.
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Butalbital
Barbiturates such as butalbital may increase the metabolism of tricyclic antidepressants such as clomipramine. Monitor for decreased therapeutic effects of tricyclic antidepressants if a barbiturate is initiated/dose increased, or increased effects if a barbiturate is discontinued/dose decreased. The tricyclic antidepressant dosage will likely need to be increased during concomitant barbiturate therapy, and reduced upon barbiturate discontinuation.
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Cimetidine
Cimetidine may increase the effect of the tricyclic antidepressant, clomipramine, by decreasing its metabolism. Monitor for changes in the therapeutic and adverse effects of clomipramine if cimetidine is initiated, discontinued or dose changed.
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Cisapride
Increased risk of cardiotoxicity and arrhythmias
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Clonidine
The tricyclic antidepressant, clomipramine, may decrease the effect of clonidine.
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Desvenlafaxine
Increased risk of serotonin syndrome. Monitor for symptoms of serotonin syndrome.
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Dihydroquinidine barbiturate
Dihydroquinidine barbiturate increases the effect of the tricyclic antidepressant, clomipramine.
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Dobutamine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of dobutamine.
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Donepezil
Possible antagonism of action
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Dopamine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of dopamine.
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Ephedra
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of ephedra.
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Ephedrine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of ephedrine.
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Epinephrine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of epinephrine.
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Fenoterol
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of fenoterol.
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Fluoxetine
The SSRI, fluoxetine, may increase the serum concentration of the tricyclic antidepressant, clomipramine, by decreasing its metabolism. Additive modulation of serotonin activity also increases the risk of serotonin syndrome. Monitor for development of serotonin syndrome during concomitant therapy. Monitor for changes in the therapeutic and adverse effects of clomipramine if fluoxetine is initiated, discontinued or dose changed.
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Fluvoxamine
The SSRI, fluvoxamine, may increase the serum concentration of the tricyclic antidepressant, clomipramine, by decreasing its metabolism. Additive modulation of serotonin activity also increases the risk of serotonin syndrome. Monitor for development of serotonin syndrome during concomitant therapy. Monitor for changes in the therapeutic and adverse effects of clomipramine if fluvoxamine is initiated, discontinued or dose changed.
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Galantamine
Possible antagonism of action
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Grepafloxacin
Increased risk of cardiotoxicity and arrhythmias
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Guanethidine
The tricyclic antidepressant, clomipramine, decreases the effect of guanethidine.
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Isocarboxazid
Possibility of severe adverse effects
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Isoprenaline
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of isoproterenol.
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Mephentermine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of mephentermine.
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Metaraminol
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of metaraminol.
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Methoxamine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of methoxamine.
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Moclobemide
Possible severe adverse reaction with this combination
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Norepinephrine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of norepinephrine.
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Orciprenaline
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of orciprenaline.
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Phenelzine
Possibility of severe adverse effects
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Phenylephrine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of phenylephrine.
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Phenylpropanolamine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of phenylpropanolamine.
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Pirbuterol
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of pirbuterol.
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Procaterol
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of procaterol.
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Pseudoephedrine
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of pseudoephedrine.
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Quinidine
Additive QTc-prolonging effects may occur. Quinidine may also increase the serum concentration of the tricyclic antidepressant, clomipramine, by decreasing its metabolism. Monitor for changes in the therapeutic and adverse effects of clomipramine if quinidine is initiated, discontinued or dose changed. Monitor for the development of torsades de pointes during concomitant therapy.
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Quinidine barbiturate
Quinidine barbiturate increases the effect of tricyclic antidepressant, clomipramine.
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Rasagiline
Possibility of severe adverse effects
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Rifabutin
The rifamycin, rifabutin, may decrease the effect of the tricyclic antidepressant, clomipramine, by increasing its metabolism. Monitor for changes in the therapeutic and adverse effects of clomipramine if rifabutin is initiated, discontinued or dose changed.
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Rifampicin
The rifamycin, rifampin, may decrease the effect of the tricyclic antidepressant, clomipramine, by increasing its metabolism. Monitor for changes in the therapeutic and adverse effects of clomipramine if rifampin is initiated, discontinued or dose changed.
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Ritonavir
Ritonavir may increase the effect and toxicity of the tricyclic antidepressant, clomipramine, by decreasing its metabolism. Monitor for changes in the therapeutic and adverse effects of clomipramine if ritonavir if initiated, discontinued or dose changed.
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Rivastigmine
Possible antagonism of action
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Salbutamol
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of salbutamol.
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Sibutramine
Increased risk of CNS adverse effects
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Sparfloxacin
Increased risk of cardiotoxicity and arrhythmias
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Tacrine
The therapeutic effects of the central acetylcholinesterase inhibitor, Tacrine, and/or the anticholinergic, Clomipramine, may be reduced due to antagonism. The interaction may be beneficial when the anticholinergic action is a side effect. Monitor for decreased efficacy of both agents.
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Tacrolimus
Additive QTc-prolongation may occur increasing the risk of serious ventricular arrhythmias. Concomitant therapy should be used with caution.
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Tamoxifen
Clomipramine may decrease the therapeutic effect of Tamoxifen by decreasing the production of active metabolites. Consider alternate therapy.
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Tamsulosin
Clomipramine, a CYP2D6 inhibitor, may decrease the metabolism and clearance of Tamsulosin, a CYP2D6 substrate. Monitor for changes in therapeutic/adverse effects of Tamsulosin if Clomipramine is initiated, discontinued, or dose changed.
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Terbinafine
Terbinafine may reduce the metabolism and clearance of Clomipramine. Consider alternate therapy or monitor for therapeutic/adverse effects of Clomipramine if Terbinafine is initiated, discontinued or dose changed.
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Terbutaline
The tricyclic antidepressant, clomipramine, increases the sympathomimetic effect of terbutaline.
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Terfenadine
Increased risk of cardiotoxicity and arrhythmias
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Thiabendazole
The strong CYP1A2 inhibitor, Thiabendazole, may increase the effects and toxicity of Clomipramine by decreasing Clomipramine metabolism and clearance. Monitor for changes in the therapeutic and adverse effects of Clomipramine if Thiabendazole is initiated, discontinued or dose changed.
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Thiothixene
May cause additive QTc-prolonging effects. Increased risk of ventricular arrhythmias. Consider alternate therapy. Thorough risk:benefit assessment is required prior to co-administration.
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Ticlopidine
Ticlopidine may decrease the metabolism and clearance of Clomipramine. Consider alternate therapy or monitor for adverse/toxic effects of Clomipramine if Ticlopidine is initiated, discontinued or dose changed.
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Toremifene
Additive QTc-prolongation may occur, increasing the risk of serious ventricular arrhythmias. Consider alternate therapy. A thorough risk:benefit assessment is required prior to co-administration.
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Tramadol
Tramadol increases the risk of serotonin syndrome and seizures. Clomipramine may decrease the effect of Tramadol by decreasing active metabolite production.
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Tranylcypromine
Increased risk of serotonin syndrome. Concomitant therapy should be avoided. A significant washout period, dependent on the half-lives of the agents, should be employed between therapies.
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Trazodone
Increased risk of serotonin syndrome. Monitor for symptoms of serotonin syndrome.
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Trimethobenzamide
Trimethobenzamide and Clomipramine, two anticholinergics, may cause additive anticholinergic effects and enhance their adverse/toxic effects. Monitor for enhanced anticholinergic effects.
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Trimipramine
Increased risk of serotonin syndrome. Monitor for symptoms of serotonin syndrome. Additive QTc-prolongation may also occur, increasing the risk of serious ventricular arrhythmias. Concomitant therapy should be used with caution.
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Triprolidine
Triprolidine and Clomipramine, two anticholinergics, may cause additive anticholinergic effects and enhance their adverse/toxic effects. Additive CNS depressant effects may also occur. Monitor for enhanced anticholinergic and CNS depressant effects.
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Trospium
Trospium and Clomipramine, two anticholinergics, may cause additive anticholinergic effects and enhanced adverse/toxic effects. Monitor for enhanced anticholinergic effects.
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Venlafaxine
Increased risk of serotonin syndrome. Monitor for symptoms of serotonin syndrome.
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Voriconazole
Additive QTc prolongation may occur. Consider alternate therapy or monitor for QTc prolongation as this can lead to Torsade de Pointes (TdP).
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Vorinostat
Additive QTc prolongation may occur. Consider alternate therapy or monitor for QTc prolongation as this can lead to Torsade de Pointes (TdP).
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Ziprasidone
Additive QTc-prolonging effects may increase the risk of severe arrhythmias. Concomitant therapy is contraindicated.
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Zolmitriptan
Use of two serotonin modulators, such as zolmitriptan and clomipramine, increases the risk of serotonin syndrome. Consider alternate therapy or monitor for serotonin syndrome during concomitant therapy.
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Zuclopenthixol
Additive QTc prolongation may occur. Consider alternate therapy or use caution and monitor for QTc prolongation as this can lead to Torsade de Pointes (TdP).
Liều Lượng & Cách Dùng :
Capsule - Oral - 25 mg, 50 mg, 75 mg
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