Can you combine Metformin with hypertension medication?

My husband has type 2 diabetes mellitus (T2DM) and his blood pressure is constantly high. He is currently on medication to control his hypertension. I’m worried he may be at risk of cardiovascular issues because of his condition. I heard that metformin is good for T2DM patients, but I’m not sure if they can take it while on hypertension drugs.