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Alpha blockers

Other names: doxazosin, Cardura, prazosin, Minipress, terazosin, Hytrin, tamsulosin, Flomax

The FAA's guidance for alpha blockers depends on what it is taken for. Each use is below, with its own FAA source and date.

Taken for high blood pressure

FAA guidance

Acceptable with conditions.

Wait

7 days

no-fly ground trial when starting a new blood pressure medication

Examiner

CACI: the examiner can issue when the condition's worksheet criteria are met. Applicants for first- or second-class must provide the worksheet's information annually; applicants for third-class with each required exam

FAA label

ACCEPTABLE

Source: FAA, Antihypertensive (HTN, blood pressure medication). FAA date 30 September 2026. Checked by Crosscheck 14 October 2026

The FAA lists alpha blockers as acceptable blood pressure medication when the certification criteria are met, with a seven-day ground trial when starting, and says the examiner should issue, if the pilot is otherwise qualified, when the pilot is on three or fewer medications.

Track your medications
Compare FAA documents: Alpha blockersWhat each of the four FAA documents says, in plain wordsOpen

The Guide's hypertension table says the number of medications counts each component (for example, lisinopril/HCTZ is 2 medications), and that with 4 or more acceptable medications the examiner should defer. Its erectile dysfunction and benign prostatic hyperplasia page says alpha blockers are allowed for daily use if there are no side effects, and no minimum wait time is required after use once the airman has successfully passed the 7-day ground trial period required for all hypertension medication. It also says that if alpha blockers are used in combination with PDE5 inhibitors, the airman should not fly until verification that no hypotensive episodes or other side effects are noted.

  • 7 days after starting: no flying

FAA rule for blood pressure medication: The FAA's hypertension worksheet (CACI) refers to the antihypertensive sheet for acceptable medications, and allows combinations of up to 3 of the classes it lists -- alpha blockers, beta-blockers, calcium channel blockers, diuretics, ACE inhibitors, ARBs, direct renin inhibitors and direct vasodilators -- and lists centrally acting antihypertensives, such as clonidine, as not acceptable. The Guide's hypertension table says the number of medications counts each component (for example, lisinopril/HCTZ is 2 medications), and that with 4 or more acceptable medications the examiner should defer. FAA, CACI – Hypertension Worksheet

Show the FAA's words: Alpha blockersThe official FAA wording: three passages, each with its document and dateOpen
FAA, Antihypertensive (HTN, blood pressure medication) · FAA date 30 September 2026
Seven-day (7) no fly/ground trial is required when starting a new hypertension (HTN) medication to verify no side effects.
AME should issue (if otherwise qualified) if the airman is on 3 or fewer medications
ACCEPTABLE HTN Medications (when certification criteria are met)
Alpha adrenergic blockers
FAA, Erectile Dysfunction and Benign Prostatic Hyperplasia Medications · FAA date 25 August 2017
Alpha blockers are allowed for daily use if there no side effects. No minimum wait time is required after use once the airman has successfully passed the 7-day ground trial period required for all hypertension medication.
If alpha blockers are used in combination with PDE5 inhibitors (common examples are listed below), the airman should not fly until verification that no hypotensive episodes or other side effects are noted.
FAA, Guide for Aviation Medical Examiners – Item 36. Heart – Hypertension · FAA date 23 March 2023
B . Treated with 3 or fewer* acceptable medications .
Follow the CACI – Hypertension Worksheet .
C . Any of the following:
Treated with 4 or more* acceptable medications;
DEFER
Notes: *Number of medications counts each component. (Example: lisinopril/HCTZ is 2 medications.)
Sources and dates: Alpha blockersFour FAA documents, with the FAA's date and when Crosscheck checked themOpen

Taken for enlarged prostate (BPH)

Alpha blockers for an enlarged prostate (BPH)

FAA guidance

Acceptable with conditions.

Wait

7 days

after the first dose (the FAA's MedGuide, whose table has no row for silodosin)

Other FAA documents add more.

Examiner

The examiner can issue when the document's criteria are met

Source: FAA, Erectile Dysfunction and Benign Prostatic Hyperplasia Medications. FAA date 25 August 2017. Checked by Crosscheck 14 October 2026

The FAA's erectile dysfunction and benign prostatic hyperplasia page says the use of medication for BPH may not be disqualifying if there are no side effects, the underlying condition is not aeromedically significant, and the applicant is otherwise qualified.

Compare FAA documents: Alpha blockers for an enlarged prostate (BPH)What each of the two FAA documents says, in plain wordsOpen

Wait

  • the 7-day ground trial period required for all hypertension medication (the FAA's ED and BPH page)

It says alpha blockers are allowed for daily use if there are no side effects, and no minimum wait time is required after use once the airman has successfully passed the 7-day ground trial period required for all hypertension medication. It says that if alpha blockers are used in combination with PDE5 inhibitors, the airman should not fly until verification that no hypotensive episodes or other side effects are noted.

The FAA's MedGuide names tamsulosin (Flomax), alfuzosin (Uroxatral) and dutasteride with tamsulosin (Jalyn) as allowed, for benign prostatic hypertrophy, with a wait of 7 days after the first dose and none after later doses or after the final dose, used as prescribed; its table has no row for silodosin. The MedGuide defines allowed as acceptable for use while performing flight or safety-related duties, provided the condition is stable/aeromedically acceptable and no adverse side effects are present.

  • 7 days after the first dose: ground observation
  • 7 days after starting: ground observation
Show the FAA's words: Alpha blockers for an enlarged prostate (BPH)The official FAA wording: two passages, each with its document and dateOpen
FAA, Erectile Dysfunction and Benign Prostatic Hyperplasia Medications · FAA date 25 August 2017
Use of medication for erectile dysfunction (ED) and/or benign prostatic hyperplasia (BPH) may not be disqualifying for medical certification if there are no side effects, the underlying condition is not aeromedically significant, and the applicant is otherwise qualified.
Alpha blockers are allowed for daily use if there no side effects. No minimum wait time is required after use once the airman has successfully passed the 7-day ground trial period required for all hypertension medication.
If alpha blockers are used in combination with PDE5 inhibitors (common examples are listed below), the airman should not fly until verification that no hypotensive episodes or other side effects are noted.
Generic: tamsulosin
Brand Name: Flomax
Drug Class: Alpha1 Blocker (uroselective)
Underlying Condition: Benign Prostatic Hypertrophy (BPH)
Use: ALLOW
INITIAL Wait Time (after first dose): 7 days
SUBSEQUENT Dose Wait Time (after each dose): None
DISCONTINUATION Wait Time (after final dose): None
Frequency Use Limit: As prescribed
Generic: alfuzosin
Brand Name: Uroxatral
Drug Class: Alpha1 Blocker (uroselective)
Underlying Condition: Benign Prostatic Hypertrophy (BPH)
Use: ALLOW
INITIAL Wait Time (after first dose): 7 days
SUBSEQUENT Dose Wait Time (after each dose): None
DISCONTINUATION Wait Time (after final dose): None
Frequency Use Limit: As prescribed
Generic: dutasteride + tamsulosin
Brand Name: Jalyn
Drug Class: 5 Alpha-Reductase Inhibitor + Alpha1 blocker (uroselective)
Underlying Condition: Benign Prostatic Hypertrophy (BPH)
Use: ALLOW
INITIAL Wait Time (after first dose): 7 days
SUBSEQUENT Dose Wait Time (after each dose): None
DISCONTINUATION Wait Time (after final dose): None
Frequency Use Limit: As prescribed
FAA, MedGuide (FAA Office of Aerospace Medicine medication reference) · FAA date 1 October 2026
ALLOWED: The medication is acceptable for use while performing flight or safety-related duties, provided the condition is stable/aeromedically acceptable and no adverse side effects are present.
Sources and dates: Alpha blockers for an enlarged prostate (BPH)Two FAA documents, with the FAA's date and when Crosscheck checked themOpen

Taking it for something else? The entries here do not cover that use. The FAA may address it in the guidance for your condition. Ask your examiner.

See also

Medication guidance alone does not determine whether a pilot is medically qualified to fly. The underlying condition, dosage, side effects, medication combinations, and certification history may affect FAA eligibility.

For informational purposes only. Not legal or medical advice.