These symptoms could also be drug induced Whenever you have these symptoms check your pulse rate besides your blood pressure The drug you are taking is a combination of telmisartan and metoprolol. Metoprolol is a beta blocker and reduces the heart rate. A very slow heart rate occurring  transiently can cause these symptoms of dizziness. So do check your pulse rate and blood pressure when you have dizziness So that we can see what needs to be done Also get a ECG and Echo done If both are normal get a twenty four hours Holter monitoring done Dr Ashish Srivastava General Physician & Clinical Cardiologist

Hello.. Well dizziness what your telling may be related to blood pressures! Or other causes may be lack of proper eating habits,anemia,middle ear disturbances,vertigo,stress etc.....it's better you consult a physician once ...get yourself evaluated... thank you

Can you elaborate what tachycardia you have from childhood. Also upload a ecg of tachycardia.  Did I do a holter