Lisinopril and mistakes

I have just started taking Lisinopril 20mg (for 5 days now). The changes to my body are incredibly noticable. The effects I have observed are:

1) Feeling of being slightly "stoned" all the time. This is quite unnerving as I have noticed that my work has suffered due to me making lots of typing mistakes and other 'minor' things such as reactions to other poeple's comments. I'm sure my blood pressure is down due to the sluggish feeling I have. Exactly the same post-marijuana lethargy (am I alowed to mention that here ? - I am not a user but have tried it in the past).

2) Erectional dysfunction. Basically Erections subside very quicky which is far from normal for me.

3) a small dry cough.

I'm taking myself off these meds. since the effects are too pronounced. I was taking them to see if it could "improve" the quality of my life not "sedate" it.

The issues I'm going to raise with my doctor on monday are ,"Are we treating the sympton and not the cause of high BP".