Australian Approved Name (AAN): Magnesium sulfate heptahydrate
Common names and synonyms: Magnesium sulphate; Magnesium sulfate; Epsom Salts
Superseded AAN: Magnesium sulfate
Organic/Inorganic: Inorganic
Molecular formula: MgSO4.7H2O
Molecular weight: 246.47
Conversions (% magnesium): 9.86
RDI for Magnesium as per NHMRC:
Infants – 0-6 months – 30mg/day (AI)
Infants – 7-12 months – 75mg/day (AI)
Children – 1-3 years – 80mg/day
Children – 4-8 years – 130mg/day
Boys – 9-13 years – 240mg/day
Boys – 14-18 years – 410mg/day
Girls – 9-13 years – 240mg/day
Girls – 14-18 years – 360mg/day
Men – 19-30 years – 400mg/day
Men – 31->70 years – 420mg/day
Women – 19-30 years – 310mg/day
Women – 31->70 years – 320mg/day
Pregnancy – 14-18 years – 400mg/day
Pregnancy – 19-30 years – 350mg/day
Pregnancy – 31-50 years – 360mg/day
Lactation – 14-18 years – 360mg/day
Lactation – 19-30 years – 310mg/day
Lactation – 31-50 years – 320mg/day
Maximum daily dose: 1.5g (when for internal use)
Mandatory components: Magnesium
Warnings and Restrictions: The requirements specified in paragraphs (a) to (c) below apply to a medicine that contains the ingredient:
(a) Magnesium is a mandatory component of magnesium sulfate heptahydrate.
(b) When used in a medicine:
(i) with an oral route of administration;
(ii) not indicated for laxative (or related) use; and
(iii) where the maximum recommended daily dose for:
(A) children aged between 1 and 3 years (inclusive) provides 65 mg or more total magnesium from inorganic magnesium salts;
(B) children aged between 4 and 8 years (inclusive) provides 110 mg or more total magnesium from inorganic magnesium salts; or
(C) individuals aged 9 years or older provides 350 mg or more total magnesium from inorganic magnesium salts;
the following warning statement is required on the medicine label:
LAX6 – Contains magnesium, which may have a laxative effect or cause diarrhoea (or words to that effect).
(c) When the route of administration is oral, the medicine must not be directed for use in infants younger than 12 months of age.
Allowable purpose of the ingredient: Active. Excipient. Homeopathic
TGA reference: British Pharmacopoeia