A case report of familial periodic paralysis.

A 20-year-old male was brought to the hospital with the complaints of severe weakness and inability to move the limbs of 12 hours duration. For the last 2 years he had the same episodes with spontaneous recovery. Family history strongly suggested involvement of other members of the family. Physical examination did not suggest any neurological deficit. All investigations were normal except serum potassium level being 2.2 meq/l during attack and 3.4 meq/l after the attack. He was treated with oral acetazolamide and potassium chloride. The case was diagnosed to be familial periodic paralysis belonged to the group 'episodic myasthenia'.