Hello Aspirant,

Am a pharmD intern , and i mostly use Medscape ,it's best and it has many features ,
But even drugs.com is also helpful but it's not offline, your phone should have internet connection while using drugs.com whereas medacape is offline ,
Apart from these two ,
You can also refer the LEXICOM book ,it will have clear information regarding drug interactions and also you will be easily grasping it's terminology ,
One more book is there ,it's meyeler's side effects of drugs ,

I hope the above information is useful to you ,

All the best !