Hydrochlorothiazide Side Effects: 33yr. old/male 5'8", 170lbs. I just switched from taking Lisino http://www.medications.com/effect/view/30420 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 f the "d" in allegra-d is sudafed, which raises blood pressure. al Fri, 11 Jul 2008 11:55:08 -0400 http://www.medications.com/effect/view/30420?item=9985 the "d" in allegra-d is sudafed, which raises blood pressure. allegra alone will not. http://www.medications.com/effect/view/30420?item=9985