No u should not use it in long run bcoz it has lots of negative impacts on body. Try to use a healthy diet with focussing on lifestyle modifications.

Need more details ur eating schedule,blood gp, medical history etc.

Creatine monohydrate is very useful for people looking to gain muscle mass. Yes, it's absolutely safe to consume creatine in the prescribed dosage. The prescribed period of intake is 1 month which you can divide into the loading phase and maintenance phase. Loading phase: You will have the supplement 4 times a day with 500 ml of juice/water each time for a week Maintenance phase: After the first week, you can have the supplement once a day with 500 ml juice/water for 4 weeks (2nd to 5th week).

Don't add them in your diet without discussing or checking your medical condition and requirement of the body. That this type of supplement is needed or not

Do not take it for more than 3 months as it might effect your kidneys

In longer Time may it will effect your kidney and  imbalance your creatine level.