Botulinum toxin and hyaluronic acid are the two most requested injectable treatments in aesthetic medicine worldwide. Many patients confuse them, but they serve entirely different purposes. Understanding when to use each — or when to combine them — is the key to achieving natural, harmonious results.
How Each Treatment Works
Botulinum toxin works by temporarily relaxing the muscles that cause expression lines. It is ideal for dynamic wrinkles — the lines that appear when you frown, smile, or raise your eyebrows. Results begin to appear 3 to 7 days after injection and typically last 4 to 6 months.
Hyaluronic acid, by contrast, is a dermal filler. It is injected to restore lost volume, define facial contours, hydrate from within, or fill in creases and folds. Results are immediate and can last 8 to 18 months depending on the area and product used.
When to Use Each Treatment
- Botulinum toxin: frown lines, crow's feet, forehead lines, subtle brow lift, excessive sweating
- Hyaluronic acid: nasolabial folds, lip enhancement, chin and jawline definition, under-eye hollows, cheek volume restoration
Can They Be Combined?
Not only can they be combined — in many cases it is the most effective strategy. Combining both treatments addresses dynamic wrinkles and volume loss simultaneously, delivering a comprehensive facial rejuvenation that looks natural and balanced. A common protocol is to apply botulinum toxin first and complement with hyaluronic acid two weeks later in the areas that need volume.
Why Physician Expertise Matters
Both botulinum toxin and hyaluronic acid require deep knowledge of facial anatomy. A natural result depends directly on the physician's experience, product selection, and injection technique. At Elyzea in Miraflores, Lima, Dr. Geldres — a board-certified plastic surgeon with extensive experience in facial harmonization — evaluates each case comprehensively to design a personalized plan that respects the natural expressiveness of the face. For international patients, both treatments are available at a fraction of US prices, with the added confidence of physician-only administration.