Vitamin d3/k2 for elderly diabetic heart

Dear Doctor, I wanted to ask about starting a Vitamin D3 + K2 supplement for a diabetic and heart patient. She is elderly, does not get much sunlight exposure and has been complaining of joint pains. She had taken Vitamin D3/K2 earlier, but we stopped it after her heart attack because someone told us Vitamin K2 might interfere with heart medications. Her current medicines are: Morning (after breakfast): • Metoheal XL 25 mg • Diamicron XR MEX 60/500 Afternoon: • Gibtulio S 10/100 Night (after dinner): • Ecospirin Gold 75/75/20 • Coversyl 4 mg • Magnesium glycinate With these medications and her history of heart disease and diabetes, is it safe to start a Vitamin D3 with K2 supplement again? If yes, what dose would you recommend.