None of the medication you are using is nephrotoxic.
Regarding your grandfather's
kidney disease - Try to know the cause and risk factors of his kidney failure. Knowing more about the disease reduces the fear and anxiety associated with the disease
Also it improves your weight management. After all stress is also a contributor for obesity. Obesity itself can cause all the diseases for which you are taking medication.
Next Steps
Stress management and weight loss
Health Tips
Being active & Calorie calculation