after how many hours inj magnesium sulfate infusion can b repeated in bronchial asthma

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Not the first line drug in Bronchial asthma Beneficial in asthma with CHF 1 point 2gm to2 gm Excess dose of magsulph is harmful useful drug in paediatric asthma 40 mg per kg infusion atleast 20 minutes Repeatation is allowed but not specified dose but up to 2 gm per kg can be used in drip

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No evidence for benefit from repeat dose . I have searched latest articles , but couldn't find anyone which is suggestive of any benefit from repeated dose.

even i m searching for the same since last few days . cant come to a conclusive answer . thank u
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After 5hrs Mgso4 causes bronchodilation by competing with calicium

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