Hydrochlorothiazide and blood pressure

33yr. old/male 5'8", 170lbs.
I just switched from taking Lisinopril 10mg for 2 weeks to get rid of memory loss issue, dizziness, lethargy, etc. Now I'm on 25mg of HCTZ and I'm having worse issues with the dizziness, tired, lethargic, dumb, drunk, dopey feeling that won't quit. The only other med that I take is Allegra-D 12 hour once a day for the last two years. I saw that high blood pressure was a possible side effect of the Allegra, but my doctor said he was pretty sure that wasn't it since my cholesterol was also high (210). I have to find something to lower my all of a sudden high blood pressure 195/100 to a comfortable level without these life hindering side effects. I have a lot of living left to do and I'm pretty fit, but now since I started these meds, I feel like I'm 70 yrs. old.

After 17 months on hydrochlorothiazide for blood pressure, I experienced a bright red itchy rash on sun-exposed areas ( primarily face and neck). It was diagnosed as solar urticaria (allergy to sunlight) and was successfully treated. However, after 24 months now on it, I have bright redness on my face and neck again (unpleasant but not particularly itchy) with really mild nausea. The doctor tells me it could be a side effect of the drug. I am now on another blood pressure pill, but it has been four days since I took the hydro. and the redness has not gone away.