Can rifampicin + isoniazid give a side effect which is vertigo? thank you.

TB treatment: Vertigo is not a common side effect of these drugs. Most likely you're on these drugs to treat or prevent tuberculosis (sometimes still called Koch's disease in some countries, including yours). As you probably know, TB can be very dangerous. Unless your vertigo is severe (e.g. making driving unsafe), do not stop treatment without first contacting the doctor or clinic treating you. Good luck.