Is it safe to take ibuprofen (200mg or 400mg) with a smoothie (eg. strawberries, bananas, blueberries, almond milk etc?

A smoothie will not make ibuprofen less safe. Common problems arising from ibuprofen use include gastric (stomach) ulcers and kidney damage. If you have poorly functioning kidneys you should avoid regular use ibuprofen. Taking ibuprofen with food can help to mitigate the damage to the stomach lining, but in general you should also avoid use if you have stomach bleeding/ulcers.