Thanks for writing to us.
Forecox contains combination of four antituberculous
drugs( isoniazide, rifampcin,ethambutol
, pyrizinamide). All this four medicine are important for treatment of TB.
These medicines can cause sideeffects like nausea, stomach upset
, fatigue, rash, acne, increase liver enzymes with prolonged use. Inspite of all this side effects one has to continue this medicines as prescribed by doctor. Your dad may get red or orange colour urine so nothing to worry about it. its due to medicine.
Also your dad should take this medicine regularly.