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Title: [Effectiveness and tolerability of oral liquid ferrous gluconate in iron-deficiency anemia in pregnancy and in the immediate post-partum period: comparison with other liquid or solid formulations containing bivalent or trivalent iron].
Author: Casparis D, Del Carlo P, Branconi F, Grossi A, Merante D, Gafforio L.
Journal: Minerva Ginecol; 1996 Nov; 48(11):511-8. PubMed ID: 9005381.
Abstract:
UNLABELLED: From the early months of pregnancy and even more so later, women suffer a deficiency of iron along with a decline in their red blood cell count. It is also now clear that women who take iron supplements during pregnancy do not suffer the same post-natal reduction in hemoglobin and ferritin as those who don't make it. A study was therefore conducted on 40 women aged 20-35, with iron-deficiency anaemia during or immediately after pregnancy all of whom presented Hb < 10 gr/dl, Ht < 33% and serum iron < 60 micrograms/dl. All women with pregnancy-related pathological conditions, pre-existing on concomitant disease (Type I diabetes, heart diseases etc.) were excluded from the study. The women whose blood chemical parameters were largely homogeneous at the start of the study were divided into four treatment groups of 10 patients each and were treated as follows: Group A with oral liquid ferrous gluconate (75 mg per diem in 2 vials a day); Group B with solid ferrous gluconate (80 mg per diem in a single effervescent tablet); Group C with solid ferrous sulphate (105 mg per diem in a single tablet); and Group D with ferric protein succinylate (80 mg per diem in 2 vials a day). All were given iron treatment for 30 days. Treatment efficacy was analysed by comparing basal and final parameters using the T-test for paired dependent samples. The tolerance of the 4 treatment protocols was assessed by the analysis of any side effects such as nausea, vomiting, epigastric pain, diarrhoea, constipation or other disorders reported by patients during treatment. RESULTS: Analysis of the therapeutic efficacy parameters (red blood cells, hemoglobin, hematocrit and serum iron) showed significant improvements but no statistically significant differences between the groups. However, the Group A patients treated with oral doses of liquid ferrous gluconate received a significantly lower cumulative dose of iron elements than the other groups: in detail 150 mg (p < 0.05) less than Groups B and D; 900 mg (< 0.001) less than Group C. By the end of treatment the Group A patients revealed significant increases versus basal values in red blood cells (p < 0.001) 1,051,000 per mm3 or 33%, in Hb (p < 0.001) 2.83 gr/dl or 32%, in Ht (p < 0.001) 8.32% or 32%, in serum iron (p < 0.05) 19.5 micrograms/dl or 61%. The same group also showed an increase in Ferritin amounting to 7.8 micrograms/dl or 24% of the basal value. As to safety, only Group A patients reported no side effects and produced no drop-outs. Gastrointestinal and other aspecific side effects caused 1 drop-out each in Groups B and C and 2 drop-outs in Group D. CONCLUSION: Numerous preparations containing bivalent or trivalent iron are available for the treatment of iron-deficiency anaemia during or immediately after pregnancy. It has been shown that preparations containing ferrous salts (+2) are more easily absorbed than those containing ferric salts (+3) since the former can be immediately absorbed by the duodenal mucosa. The study reported here reveals that oral ferrous gluconate in liquid form is more effective and above all better tolerated than other solid or liquid formulations containing elementary iron.

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