The Cardiologist will have discussed the reasons for suggesting the use of statins and I would take his advice.
Yes, there are , or maybe, side effects with statins affecting some people, the incidence varies from study to study.
I would suggest that you do not Google the side effects as that may put thoughts into your hisband's mind concerning events in the future that may have nothing to do with statins.
One can only try the medication and assess it's suitability over say, a month or so.