Alpha-1 Blockade for Alcohol Use Disorder (AUD)

Inclusion Criteria: * Male or female, 18 years of age * Meet the DSM-5 criteria for AUD * Desire to reduce or quit alcohol drinking * Breath alcohol (BrAC) = 0.00 at each visit * In good health as confirmed by medical history, physical examination and lab tests * Willing to adhere to the study procedures * Understand informed consent and questionnaires in English at an 8th grade level Exclusion Criteria: * Women who are breastfeeding or /positive urine test for pregnancy * CrCl\<60mL/min * Suicide attempt in the last three months * Current diagnosis of other substance disorder other than nicotine as assessed by self-report and urine toxicology screen at baseline * Current use of medication that may interact with doxazosin and/or yohimbine * History of allergy to any alpha receptor blockers * Clinical Institute Withdrawal Assessment for Alcohol revised (CIWA-Ar) score ≥ 8 * Treatment with disulfiram, naltrexone, acamprosate, topiramate within 1 month prior to screening * Treatment with any alpha-blocker * Individuals with cardiac heat failure (CHF), as assessed by the medical history, the physical exam and the ECG. * Baseline hypotension defined as BP reading lower than 90/60 mmHg * Use of phosphodiesterase inhibitors (PDE5) erectile dysfunction medication