HI I have gone through your mail and as you have told that your wife is a diagnosed patient of tubercular lymphadenitis
of neck,she is on antitubercular treatment and now she developed high grade fever with chills and rigors
,as you observed that fever usually comes at night and early morning and goes away in daytime,she is now feeling weakness and is drowsy.Analysing your complaints I would like to tell you since your wife is a diagnosed case of tuberculosis
so antitubercular tretment should be contninued and this fever is due to some associated infection,considering the story of disease she may be having MALARIA
or UTI (urinary tract infection
),thus she should go for these investigations- (1) Blood-CBC,Malaria parasite,ESR, (2) Urine-Routine & microscopic, (3) Urine-Culture & sensitivity.I hope these investigations will clear the picture than after consultation with her doctor she may get additional medicines for this fever.Thanks.