Fenoterol precipitating myotonia in a minimally affected case of recessive myotonia congenita.
Fenoterol is used in patients with premature labor to delay delivery. A young women treated with fenoterol developed severe generalized myotonia. Symptoms disappeared after medication had  been stopped. In a later study myotonic discharges were found electromyographically in the muscles of the patient and her brother. Both suffered from subclinical recessive myotonia congenita (Becker). A heterozygous manifestation may be supposed.
D000328:Adult; D004983:Ethanolamines / Q000009:adverse effects*; D005260:Female; D005280:Fenoterol / Q000009:adverse effects*; D006579:Heterozygote; D006801:Humans; D008297:Male; D008875:Middle Aged; D009224:Myotonia Congenita / Q000175:diagnosis* / Q000188:drug therapy / Q000235:genetics; D010869:Pindolol / Q000627:therapeutic use; D011247:Pregnancy; D011248:Pregnancy Complications
D004983:Ethanolamines; D005280:Fenoterol; D010869:Pindolol