FAC FAC Injectable Treatments & Protocols 1 — Questions and Answers
Question 1: Botulinum toxin type A works by:
- Stimulating acetylcholine release at the neuromuscular junction
- Blocking acetylcholine release to temporarily paralyze the targeted muscle (Correct answer)
- Dissolving hyaluronic acid in the dermis
- Triggering collagen synthesis via fibroblast activation
Correct answer: Blocking acetylcholine release to temporarily paralyze the targeted muscle
Botulinum toxin A inhibits the release of acetylcholine from nerve terminals, causing temporary muscle relaxation.
Question 2: The typical onset of visible results after botulinum toxin injections is:
- Immediately after injection
- 3–5 days, with full effect at 10–14 days (Correct answer)
- 24 hours
- 4–6 weeks
Correct answer: 3–5 days, with full effect at 10–14 days
Botulinum toxin begins working in 3–5 days with maximum effect seen at approximately 10–14 days post-injection.
Question 3: Hyaluronic acid dermal fillers can be reversed using which enzyme?
- Collagenase
- Hyaluronidase (Correct answer)
- Lipase
- Protease
Correct answer: Hyaluronidase
Hyaluronidase dissolves hyaluronic acid fillers and is the antidote for vascular occlusion emergencies.
Question 4: Which of the following is a contraindication for botulinum toxin injections?
- Mild seasonal allergies
- Pregnancy or breastfeeding (Correct answer)
- History of acne
- Fitzpatrick skin type IV
Correct answer: Pregnancy or breastfeeding
Botulinum toxin is contraindicated during pregnancy and breastfeeding due to insufficient safety data.
Question 5: The recommended storage temperature for unopened botulinum toxin vials is:
- Room temperature (68–77°F)
- Refrigerated at 2–8°C (36–46°F) (Correct answer)
- Frozen at -20°C
- Stored in a dark cabinet at 15°C
Correct answer: Refrigerated at 2–8°C (36–46°F)
Unopened botulinum toxin should be stored refrigerated at 2–8°C to maintain its potency and shelf life.
Question 6: A patient develops a Tyndall effect after hyaluronic acid filler injection. This appears as:
- Redness and swelling at the injection site
- A bluish discoloration of the skin over the treated area (Correct answer)
- Hyperpigmentation in the treated zone
- Hardening of the filler product
Correct answer: A bluish discoloration of the skin over the treated area
The Tyndall effect is a bluish hue caused by light scattering when filler is placed too superficially in the dermis.
FAC FAC Injectable Treatments & Protocols 1
Botulinum toxin type A works by: