Study title and authors:
Comparative Effects of Lovastatin and Simvastatin on Liver Function tests in Hyperlipidaemic Patients
Zena Sattam, Hamad Al-Jubori, Isam Hamo Mahmood
This study can be accessed at: http://www.iasj.net/iasj?func=fulltext&aId=48121
Drug-induced liver damage has become an important public health problem, contributing to more than 50% of acute liver failure cases, and there have been observations of a large number of liver failure cases on statin therapy.
In liver function tests, liver damage is confirmed with increased levels of bilirubin and the liver enzymes; Alanine transaminase, aspartate aminotransferase and alkaline phosphatase.
This study measured the effects of statins on liver function tests. The study included:
(i) 53 patients, aged 35-60 years, took simvastatin therapy. The simvastatin dose ranged from 10 to 20mg a day. Duration of treatment ranged from one month to four years. (Simvastatin group).
(ii) 42 patients, aged 38-60, took lovastatin therapy. The lovastatin dose ranged from 10 to 20mg a day. Duration of treatment ranged from one month to three years. (Lovastatin group).
(iii) A control group of 50 subjects, aged 35-58 who did not take statins. (No-statin group).
The study found:
(a) The alanine transaminase levels of the lovastatin group were 113% higher than the no-statin group.
(b) The aspartate aminotransferase levels of the lovastatin group were 90% higher than the no-statin group.
(c) The alkaline phosphatase levels of the lovastatin group were 11% higher than the no-statin group.(d) The bilirubin levels of the lovastatin group were 40% higher than the no-statin group.
(e) The alanine transaminase levels of the high dose (20 mg a day) lovastatin group were 181% higher than the no-statin group.
(f) The aspartate aminotransferase levels of the high dose (20 mg a day) lovastatin group were 151% higher than the no-statin group.
(g) The alkaline phosphatase levels of the high dose (20 mg a day) lovastatin group were 20% higher than the no-statin group.
(h) The bilirubin levels of the high dose (20 mg a day) lovastatin group were 72% higher than the no-statin group.
(i) The alanine transaminase levels of the long term usage (over 12 months) lovastatin group were 333% higher than the no-statin group.
(j) The aspartate aminotransferase levels of the long term usage (over 12 months) lovastatin group were 321% higher than the no-statin group.
(k) The alkaline phosphatase levels of the long term usage (over 12 months) lovastatin group were 24% higher than the no-statin group.
(l) The bilirubin levels of the long term usage (over 12 months) lovastatin group were 145% higher than the no-statin group.
(m) The alanine transaminase levels of the simvastatin group were 103% higher than the no-statin group.
(n) The aspartate aminotransferase levels of the simvastatin group were 60% higher than the no-statin group.
(o) The alkaline phosphatase levels of the simvastatin group were 6% higher than the no-statin group.(p) The bilirubin levels of the simvastatin group were 45% higher than the no-statin group.
(q) The alanine transaminase levels of the high dose (20 mg a day) simvastatin group were 150% higher than the no-statin group.
(r) The aspartate aminotransferase levels of the high dose (20 mg a day) simvastatin group were 102% higher than the no-statin group.
(s) The alkaline phosphatase levels of the high dose (20 mg a day) simvastatin group were 3% higher than the no-statin group.
(t) The bilirubin levels of the high dose (20 mg a day) simvastatin group were 55% higher than the no-statin group.
(u) The alanine transaminase levels of the long term usage (over 12 months) simvastatin group were 255% higher than the no-statin group.
(v) The aspartate aminotransferase levels of the long term usage (over 12 months) simvastatin group were 240% higher than the no-statin group.
(w) The alkaline phosphatase levels of the long term usage (over 12 months) simvastatin group were 3% higher than the no-statin group.
(x) The bilirubin levels of the long term usage (over 12 months) simvastatin group were 83% higher than the no-statin group.
The results from this study revealed significant increases of alanine transaminase, aspartate aminotransferase and bilirubin levels in the lovastatin group compared with the control group and significant increases of alanine transaminase and bilirubin in the simvastatin group when compared with the control group.
The study also revealed that the higher the dose of the statin or the longer the dose of the statin generally correlated with increased levels of the liver enzymes.
(ii) 42 patients, aged 38-60, took lovastatin therapy. The lovastatin dose ranged from 10 to 20mg a day. Duration of treatment ranged from one month to three years. (Lovastatin group).
(iii) A control group of 50 subjects, aged 35-58 who did not take statins. (No-statin group).
The study found:
(a) The alanine transaminase levels of the lovastatin group were 113% higher than the no-statin group.
(b) The aspartate aminotransferase levels of the lovastatin group were 90% higher than the no-statin group.
(c) The alkaline phosphatase levels of the lovastatin group were 11% higher than the no-statin group.(d) The bilirubin levels of the lovastatin group were 40% higher than the no-statin group.
(e) The alanine transaminase levels of the high dose (20 mg a day) lovastatin group were 181% higher than the no-statin group.
(f) The aspartate aminotransferase levels of the high dose (20 mg a day) lovastatin group were 151% higher than the no-statin group.
(g) The alkaline phosphatase levels of the high dose (20 mg a day) lovastatin group were 20% higher than the no-statin group.
(h) The bilirubin levels of the high dose (20 mg a day) lovastatin group were 72% higher than the no-statin group.
(i) The alanine transaminase levels of the long term usage (over 12 months) lovastatin group were 333% higher than the no-statin group.
(j) The aspartate aminotransferase levels of the long term usage (over 12 months) lovastatin group were 321% higher than the no-statin group.
(k) The alkaline phosphatase levels of the long term usage (over 12 months) lovastatin group were 24% higher than the no-statin group.
(l) The bilirubin levels of the long term usage (over 12 months) lovastatin group were 145% higher than the no-statin group.
(m) The alanine transaminase levels of the simvastatin group were 103% higher than the no-statin group.
(n) The aspartate aminotransferase levels of the simvastatin group were 60% higher than the no-statin group.
(o) The alkaline phosphatase levels of the simvastatin group were 6% higher than the no-statin group.(p) The bilirubin levels of the simvastatin group were 45% higher than the no-statin group.
(q) The alanine transaminase levels of the high dose (20 mg a day) simvastatin group were 150% higher than the no-statin group.
(r) The aspartate aminotransferase levels of the high dose (20 mg a day) simvastatin group were 102% higher than the no-statin group.
(s) The alkaline phosphatase levels of the high dose (20 mg a day) simvastatin group were 3% higher than the no-statin group.
(t) The bilirubin levels of the high dose (20 mg a day) simvastatin group were 55% higher than the no-statin group.
(u) The alanine transaminase levels of the long term usage (over 12 months) simvastatin group were 255% higher than the no-statin group.
(v) The aspartate aminotransferase levels of the long term usage (over 12 months) simvastatin group were 240% higher than the no-statin group.
(w) The alkaline phosphatase levels of the long term usage (over 12 months) simvastatin group were 3% higher than the no-statin group.
(x) The bilirubin levels of the long term usage (over 12 months) simvastatin group were 83% higher than the no-statin group.
The results from this study revealed significant increases of alanine transaminase, aspartate aminotransferase and bilirubin levels in the lovastatin group compared with the control group and significant increases of alanine transaminase and bilirubin in the simvastatin group when compared with the control group.
The study also revealed that the higher the dose of the statin or the longer the dose of the statin generally correlated with increased levels of the liver enzymes.
