After taking hawthorne berry(500mg) how long should i wait before taking tylenol (acetaminophen) or maalox?

Talk to your doc: Hawthorn berry should be used with your doctor's consent. People with heart disease especially should check with their doc. Maalox less than 30 minutes before taking a med or less than an hour after taking a medicine, can affect absorption of the med. See the scientific evidence here http://www.med.nyu.edu/content?ChunkIID=21742 Why do you want to take it?

There is no clear: interaction. You shouldn't to wait.