When seeking the most effective non-surgical solutions for facial rejuvenation in San Francisco, BOTOX® and Dysport® represent the gold standard in neuromodulator treatments. At Dr. Karen Horton’s San Francisco Plastic Surgery practice, injectable wrinkle relaxer treatments are performed by Board-Certified Nurse Practitioners Emily Sespaniak, MSN, NP-C, and Agnes Wong, MSN, NP-BC, who bring advanced training, precision, and artistry to every treatment. Their approach focuses on achieving natural-looking results that enhance your unique facial features while preserving expression.

Located in the vibrant San Francisco Bay Area, the practice is a trusted destination for patients seeking sophisticated, non-surgical facial rejuvenation. Our Nurse Practitioners combine a deep understanding of facial anatomy with meticulous injection technique to tailor each BOTOX and Dysport treatment to a patient’s individual goals. Both providers are known for their thoughtful, conservative approach and commitment to patient education, comfort, and safety.

Key Differences Between BOTOX and Dysport

While both treatments utilize botulinum toxin type A, they differ in their molecular structure and diffusion patterns:

• BOTOX: More concentrated formulation with precise targeting capabilities
• Dysport: Broader diffusion pattern, ideal for treating larger areas like the forehead
• Onset: Dysport may show results 2-3 days earlier than BOTOX
• Duration: Both typically last 3-4 months, though individual results may vary

Additional & Advanced Treatment Areas

In addition to classic wrinkle treatment, BOTOX and Dysport may be used in several advanced applications when performed by experienced injectors with a deep understanding of facial anatomy:

Masseter (Jawline Slimming): Neuromodulator treatment of the masseter muscles may help soften a square jawline and can also be beneficial for patients who clench or grind their teeth.

Platysmal Bands (Neck Bands): Vertical neck bands can be softened to create a smoother, more youthful neck profile.

DAO (Corners of the Mouth): Treating the depressor anguli oris (DAO) muscles can reduce downward pull at the corners of the mouth, creating a more relaxed, balanced expression.

Lip Flip: Small, strategically placed injections above the upper lip can subtly enhance lip shape by allowing the lip to roll outward without adding volume.

Trapezius (Trap Tox): Treatment of the trapezius muscles may help reduce muscle tension while creating a more elongated neckline and shoulder contour.

Each treatment plan is customized based on facial structure, muscle activity, and individual aesthetic goals to support natural-looking results.

Advanced Applications

Our Nurse Practitioners’ advanced training in facial anatomy enables them to offer sophisticated treatment approaches beyond traditional wrinkle reduction:

• Brow Lift Effect: Strategic injection patterns can create a subtle lifting effect, helping alleviate heavy brows and lids and providing a more rested appearance.³ opening the eye area without surgery.
• Bunny Lines: Fine lines that appear on the nose when smiling can be addressed with precise neuromodulator placement.
• Lip Lines: Vertical upper lip lines (also known as “smokers’ lines” or “barcode lines”) around the mouth benefit from careful treatment that maintains natural lip movement.
• Lip Flip for Gummy Smile: A few units placed above the upper lip can relax muscle pull, reducing gum show and enhancing balance in the smile.
• LLSAN for Gummy Smile: a few units in this muscle can reduce gum show by lowering the upper lip. This can also be combined with a lip flip. 
• Jawline Contouring: BOTOX and Dysport injections into the masseter muscles can create a more refined jawline while addressing teeth grinding.⁴
• Neck Bands: Vertical neck bands (platysmal bands) can be softened with targeted treatments for a more youthful neck profile.⁵
• Excessive Sweating (Hyperhidrosis): Both BOTOX and Dysport are FDA-approved for treating excessive underarm sweating.
• DAOs: Treating the DAOs reduces downward pull at the corners of the mouth, creating a more lifted and relaxed expression
• Chin pebbling (mentalis): Treatment smooths chin dimpling and texture irregularities, enhancing overall chin contour and balance
• Trapezius: Help reduce tension and shoulder tightness while creating a more elongated, contoured neckline

View More Botox Patient Results in Our Gallery

The Treatment Experience

Consultation and Customized Treatment Plan

Every patient begins with a comprehensive consultation, during which facial anatomy and aesthetic goals are discussed, followed by the development of a customized treatment plan. This personalized approach ensures optimal results while maintaining your natural expressions. Patients should inform their provider about any previous BOTOX injections and relevant health conditions.

Treatment Process

The actual injection process typically takes 15-30 minutes, depending on the number of areas being treated. Using ultra-fine needles, your Nurse Practitioner precisely places the neuromodulator into targeted facial muscles. Most patients describe the sensation as brief, minor pinpricks with minimal discomfort. Cooling packs before the treatment add additional comfort to the experience.

Safety Protocols:

• Sterile technique and single-use needles
• Pre-treatment medical history review
• Comprehensive informed consent process
• Emergency protocols in place
• Post-treatment monitoring and follow-up

Post-Treatment Care and Recovery

One of the significant advantages of neuromodulator treatments is the minimal downtime required. Most patients can return to normal activities immediately following treatment.

Immediate Post-Treatment Guidelines:

• Avoid lying flat for 4 hours
• Refrain from vigorous exercise for 24 hours
• Avoid rubbing or massaging treated areas

Results and Longevity

Results typically become visible within 3-7 days, with full effects apparent within two weeks. The duration of results varies by individual but generally lasts 3-4 months. Patient satisfaction rates fall between 87% and 99% for BOTOX and Dysport treatments.^6,7

Factors influencing longevity of neuromodulator effects include:

• Individual metabolism
• Muscle strength and activity
• Treatment area
• Dosage and injection technique
• Lifestyle factors

Safety Profile and Side Effects

Both BOTOX and Dysport have extensive safety profiles backed by decades of clinical use. Serious adverse events are extremely rare when treatments are performed by qualified practitioners.⁷

Common, temporary side effects may include:

• Mild swelling or redness at injection sites (occurs in <5% of patients)
• Temporary bruising (occurs in <10% of patients)
• Headache (rare, <2% of patients)
• Temporary asymmetry (typically resolves within days, <1% of patients)

Serious complications are extremely rare but may include:

• Allergic reactions (<0.1% of patients)
• Unintended muscle weakness
• Difficulty swallowing or breathing (extremely rare)

Our practice maintains comprehensive emergency protocols and is trained in managing any potential complications that may arise.

¹ American Society of Plastic Surgeons. 2024 Plastic Surgery Statistics Report. https://www.plasticsurgery.org/documents/news/statistics/2024/plastic-surgery-statistics-report-2024.pdf. Accessed September 5, 2025.
² American Academy of Ophthalmology. How Does Botulinum Toxin (BOTOX) Work? https://www.aao.org/eye-health/treatments/how-does-botulinum-toxin-BOTOX-work. Accessed September 5, 2025.
³ Dermatologic Surgery. Lifting With Neuromodulators. https://pubmed.ncbi.nlm.nih.gov/39196835/. Accessed September 5, 2025.
⁴ Cureus. Evaluation of the Efficacy of Low-Dose Botulinum Toxin Injection Into the Masseter Muscle for the Treatment of Nocturnal Bruxism: A Randomized Controlled Clinical Trial. https://pmc.ncbi.nlm.nih.gov/articles/PMC9719743/. Accessed September 5, 2025.
⁵ Aesthetic Surgery Journal. Improving Neck and Jawline Aesthetics With OnabotulinumtoxinA by Minimizing Platysma Muscle Contraction Effects: Efficacy and Safety Results in a Phase 3 Randomized, Placebo-Controlled Study. https://pubmed.ncbi.nlm.nih.gov/39475141/. Accessed September 5, 2025.
⁶ Journal of Cosmetic Dermatology. Evaluation of people’s satisfaction with botulinum toxin injection for facial rejuvenation based on age. https://pubmed.ncbi.nlm.nih.gov/38500014/. Accessed September 5, 2025.
⁷ The Journal Of Clinical And Aesthetic Dermatology. Patient Satisfaction with AbobotulinumtoxinA for Aesthetic Use in the Upper Face: A Systematic Literature Review and Post-hoc Analysis of the APPEAL Study. https://pmc.ncbi.nlm.nih.gov/articles/PMC8211347/. Accessed September 5, 2025.
⁸ American Academy of Dermatology. Botulinum toxin therapy: FAQs. https://www.aad.org/public/cosmetic/wrinkles/botulinum-toxin-faqs. Accessed September 5, 2025.