Mefenamic acid oral

 Mefenamic Acid dosages are mentioned below

In Paediatrics

For oral administration in children above 6 months. 

Recommended dosage based on body weight

Mefenamic acid is usually administered in a dose of 4 to 6.5 mg/kg body weight every 8 hours
 or 
25 mg/kg/day in three divided doses, as needed. 

Recommended dosage based on age group

Mefenamic acid suspension 100 mg/5 ml

  •  6 months to 1 year: 2.5 ml three times daily.
  •  2 to 4 years: 5 ml three times daily.
  •  5 to 8 years: 7.5 ml three times daily.
  •  9 to 12 years: 10 ml three times daily.

Do not exceed the recommended dosage in children.

Infants over 6 months to children 12 years


Mefenamic acid suspension 50 mg/5 ml is licensed in infants over 6 months.

Infants over 6 months 25 mg/kg of bodyweight daily in divided doses or:

The following doses can be used in specific age ranges:

9 years to 12 years: four 5 ml spoonfuls.
5 years to under 9 years: three 5 ml spoonfuls
2 years to under 5 years: two 5 ml spoonfuls
6 months to under 2 years: one 5 ml spoonfuls

Doses may be repeated as necessary, up to three times daily.

Apart from the treatment of Still's disease, therapy should not be continued for longer than 7 days.

Children aged 12 to 18 years and Adults


The recommended dose is 500 mg three times daily.

In menorrhagia to be administered on the first day of excessive bleeding and continued according to the judgement of the physician.

In dysmenorrhoea to be administered at the onset of menstrual pain and continued according to the judgement of the physician.

For Adults

Initial dose: 500 mg orally once
Following initial dose: 250 mg orally every 6 hours as needed or 500mg every 8 hours.
Duration of therapy: Usually not to exceed 1 week

Pregnancy and Lactation

Pregnancy

Mefenamic acid is contraindicated in the third trimester of pregnancy.

Lactation

Mefenamic acid is contraindicated in breastfeeding.


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