This R-CINEX 300 MG/450 MG (ISONIAZID/RIFAMPICIN) is a combination medication used to treat tuberculosis. It contains Isoniazid 300 mg and Rifampicin 450 mg, both of which are powerful antibiotics. This medicine should be taken as directed by your doctor, and it may take several months of continuous use for the full effect to be seen. R-CINEX 300 MG/450 MG is available for purchase online in the USA and is a safe and effective way to treat tuberculosis.