I did appreciate some heart rate increase, but it wasn't to uncomfortable levels. It did cause atrial fibrillation, but it was sporadic.

My primary symptom was essentially feeling extremely very tired and lethargic after one drink or less. And this lasted well beyond the time it should take to metabolize the alcohol. I could feel this way for a few hours after half a drink.

It also exacerbated the other symptoms I was having. For example, a feeling of detachment from my surroundings, difficulty hearing conversations over background noises, and the issues with my vision.

It was always hard to describe the visual symptoms that I had, as I didn't have any loss of acuity. The best way I ever had to describe it was seeing double, but the images were overlaid so that I didn't actually see 'two' or anything. My brain was unable to see, for example, a traffic light, as a singular light. Closing one eye made this feeling go away. It was so weird! I was always uncomfortable outdoors for this reason. Looking into the distance caused a sensation of vertigo and a general feeling that I couldn't quite 'see' what I was looking at.

Because my Doctor could find no cause for this, and because it started to slowly improve, there wasn't much done to find a cause. The neurologist says it could have been a viral infection that caused a mild encephalitis that just wasn't bad enough to show up on an MRI, but it also didn't show up on the EEG, so it was just a mystery.

The coincident development of a neuropathy could be a coincidence--I doubt I'll ever know.