Hi there,
How are her nights going? Does she wake up at all?
She's getting a lot of day time sleep! Usually 6.5months are on a 4 hour EASY and getting 2 naps of 1.5-2 hours and a catnap is getting phased out. It's incredible that she can sleep so much during the day.
I found I was in the same predicament as yours in terms of my lo giving tired cues around 1.5 - 2 hours. However, she gave me short naps..yours is loving her naps and giving you long naps still!
At this age though, their sleepy cues get very unreliable as their bodies are "used" to going to sleep at a certain time and are just preparing for sleep bc that what they think they're going to do at that time. If you were to start increasing her As, you could take her into a dark room, read some books or walk around with her in a bjorn.
In terms of the medicine, could you give it to her first thing in the morning? Los can usually wait about a half hour before eating..by the time you change their diaper, change their clothes ..etcetc.
Or, use those lovely naps to your advantage. You could give her the medicine just before she goes down to a nap. You know it'll be at least 30 mins as she's asleep for an hour and half...how does that sound?
If everything is working for you and she`s sleeping well at night ..then there may be no need to change your routine just yet. She should be dropping some sleep soon.
why does she need 5 meals a day - is she eating small meals? Is she in pain? Is her reflux under control?