LESI LESI Pharmacology 2

Question 1

How long does the anti-inflammatory effect of a single epidural corticosteroid injection typically last?

Accepted Answer

1-3 weeks

Answer

24-48 hours

Answer

3-6 months

Answer

1-2 years

Question 2

What is the FDA's current regulatory status of corticosteroid use for epidural injection?

Accepted Answer

Off-label use — not approved for epidural administration

Answer

Fully FDA-approved with specific epidural indication

Answer

Approved only for caudal route

Answer

Banned for epidural use since 2014

Question 3

Systemic absorption of epidural corticosteroids can suppress the hypothalamic-pituitary-adrenal (HPA) axis for approximately how long?

Accepted Answer

1-3 weeks

Answer

12-24 hours

Answer

1-3 days

Answer

6-12 months

Question 4

Which contrast agent is used to confirm epidural needle placement under fluoroscopy before steroid injection?

Accepted Answer

Non-ionic iodinated contrast (e.g., iohexol)

Answer

Gadolinium

Answer

Barium sulfate

Answer

Methylene blue

Question 5

The maximum recommended number of lumbar ESI injections in a 12-month period per most clinical guidelines is:

Accepted Answer

3-4 injections

Answer

1-2 injections

Answer

5-6 injections

Answer

Unlimited as needed

Question 6

Betamethasone sodium phosphate is classified as which type of steroid particle?

Accepted Answer

Non-particulate (soluble)

Answer

Particulate

Answer

Semi-particulate

Answer

Crystalline aggregate