Hereof, is first aid pharmacology enough for Step 1?
There is sufficient pharm information in FA to do well on Step 1. You might run into a few pharm questions with drugs you've never heard of, but you're unlikely to get those right even if you supplement with other sources.
Similarly, how many hours should I study for Usmle Step 1? 500-600 hours
Besides, is first aid and Uworld enough for Step 1?
Virtually everyone preparing for Step 1 will use UWorld and First Aid. The USMLE Step 1 is the most critical exam most of us will take in our medical careers.
Is Step 1 harder than Uworld?
Took Step recently, I'd say it was more similar to uworld than nbme. It was like doing a hard block of uworld 7 times. So, you would say that Step 1 was harder than Uworld :O.