From
Jess Shan's description, Reactive Hypoglycaemia was my first thought. To be honest, as she's under the care of an endocrinologist I couldn't understand why that isn't being investigated.
You are exactly correct,
catinahat, with your assertion that IF it is Reactive Hypoglycaemia the worst thing to do to treat a hypoglycaemic event is to eat sweets and/or drink regular orange juice. This will simply raise your blood glucose levels rapidly, stimulating the pancreas to 'over-produce' insulin in a deliberate attempt to bring the blood glucose level back down, causing a 'rollercoaster' type of effect. i.e. going 'low', going 'high', going 'low' again.
Of course, if your blood glucose level is falling to 2.2 mmol/l then you DO need something sweet to raise your blood glucose level quickly, but this should be followed up with something 'more substantial', such as a sandwich, etc. and preferably one that contains not just carbs but also fat, which will slow down the rate at which it's broken down and absorbed into the bloodstream. (I guess that's one of the reasons that her endocrinologist has prescribed Acarbose, which slows down the rate of absorption of anything imbibed ... either eaten or drunk ... in an attempt to control what's happening with insulin production and/or release.)