New to neurotoxin? Read the full guide to Botox and neurotoxins in Newport Beach, or see how long Botox actually lasts.

Neurotoxin for expression lines, injected personally by Dr. Amir Mortazavi, MD.

At most medical spas in Orange County, your injector is a nurse, nurse practitioner, or physician assistant. That's legal in California and often perfectly good care. It's simply not what happens here — Dr. Mortazavi performs every injection himself, every visit.

Select your area:

Forehead — horizontal lines across the forehead from raising the brows.

Frown Lines (Glabella) — the vertical "elevens" between the brows that read as tense or angry at rest.

Crow's Feet — lines fanning from the outer corners of the eyes, most visible when smiling.

All 3 Areas — the standard upper-face treatment. Most patients treating one area eventually treat all three, because relaxing one muscle group can make the others more noticeable by comparison.

Botox, Dysport, Xeomin, Letybo — which one?

All four are Type A botulinum toxins and all work the same way. The differences are real but modest:

Dysport tends to have faster onset and spreads slightly more, which suits broad areas like the forehead.

Xeomin contains no accessory proteins — a "naked" formulation some patients prefer, particularly those concerned about developing resistance over time.

Botox is the most established with the longest track record.

Letybo is a newer Type A option.

Dr. Mortazavi will recommend based on your treatment area, prior response, and history. If you've done well on a particular product before, that carries weight.

What to expect: injections take a few minutes. Onset begins day 3 to 5, with full effect at day 10 to 14 — don't judge your result before two weeks. Duration is typically three to four months. Mild redness or small bumps at injection sites resolve within an hour.

After treatment: stay upright for four hours, avoid rubbing the area, and skip strenuous exercise for 24 hours.

On dosing. The most common reason patients feel their neurotoxin "didn't work" is underdosing — receiving fewer units than the muscle actually required. Some practices quote per-area pricing built around a low unit count, which looks competitive and underdelivers.

Muscle mass varies considerably between patients, and men generally require more than women. You'll be told what your treatment involves before it happens.

If your neurotoxin has genuinely stopped working — if it used to last and now doesn't, and switching between Type A brands hasn't helped — that may be antibody-mediated resistance to Type A. Myobloc is a Type B toxin and works when Type A no longer does. Few practices in Orange County carry it.