Final answer:
Alpha-1 Blockers are a class of drugs used for treating both BPH and HTN by relaxing smooth muscles in blood vessels and the prostate.
Step-by-step explanation:
One drug class that is used to treat both Benign Prostatic Hyperplasia (BPH) and Hypertension (HTN) is Alpha-1 Blockers. These medications work by relaxing the smooth muscles of the blood vessels and the prostate, which can decrease blood pressure and improve urine flow in BPH, respectively. Examples of alpha-1 blockers include doxazosin, terazosin, and tamsulosin, although tamsulosin is primarily used for BPH due to its selectivity for the alpha-1 receptors located in the prostate.