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2017 ; 9
(ä): 47-57
Nephropedia Template TP
gab.com Text
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English Wikipedia
Simultaneous administration of fluoxetine and simvastatin ameliorates lipid
profile, improves brain level of neurotransmitters, and increases bioavailability
of simvastatin
#MMPMID28442937
Al-Asmari AK
; Ullah Z
; Al Masoudi AS
; Ahmad I
J Exp Pharmacol
2017[]; 9
(ä): 47-57
PMID28442937
show ga
Simvastatin (STT), a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor,
is widely prescribed for dyslipidemia, whereas fluoxetine (FLX) is the
first-choice drug for the treatment of depression and anxiety. A recent report
suggests that selective serotonin reuptake inhibitors can interact with the
cytochrome P450 3A4 substrate, and another one suggests that STT enhances the
antidepressant activity of FLX. However, the data are inconclusive. The present
study was designed to explore the pharmacokinetic and pharmacodynamic
consequences of coadministration of STT and FLX in experimental animals. For
this, Wistar rats weighing 250±10 g were divided into four groups, including
control, STT (40 mg/kg/day), FLX (20 mg/kg/day), and STT+FLX group, respectively.
After the dosing period of 4 weeks, the animals were sacrificed, and the blood
and brain samples were collected for the analysis of STT, simvastatin acid (STA),
FLX, total cholesterol, triglyceride, high-density lipoprotein (HDL),
5-hydroxytryptamine, dopamine, and hydroxy indole acetic acid. It was found that
the coadministration resulted in a significant increase in the bioavailability of
STT in the plasma (41.8%) and brain (68.7%) compared to administration of STT
alone (p<0.05). The maximum drug concentration (C(max)) of STT was also found to
be increased significantly in the plasma and brain compared to that achieved
after monotherapy (p<0.05). However, STT failed to improve the pharmacokinetics
of FLX up to a significant level. The results of this study showed that the
combined regimen significantly reduced the level of cholesterol and triglyceride
and increased the level of HDL when compared to STT monotherapy. Furthermore, the
coadministration of STT with FLX led to an elevated level of neurotransmitters in
the brain (p<0.05). FLX increased the concentration of STT in the plasma and
brain. The coadministration of these drugs also led to an improved lipid profile.
However, in the long-term, this interaction may have a vital clinical importance
because the increase in STT level may lead to life-threatening side effects
associated with statins.