Botox (Allergan) explained: brand profile, how long results last, and Thailand vs Korea pricing

Allergan's Botox has become the generic term Thai patients use for every botulinum toxin, yet it is only one brand in a market with a dozen. What keeps it the reference standard is the largest clinical dataset in the class and consistent potency between lots, which lets injectors predict diffusion and onset more precisely than when switching to an unfamiliar brand.

Technically, it comes as 50- and 100-unit vials of freeze-dried powder reconstituted with saline, so the final concentration depends on how much saline the clinic adds. That matters because it dictates how firm or soft the product feels, how far it spreads and which tissue plane it belongs in. Experienced injectors pick the sub-model to match the site rather than choosing on brand name alone.

Popular placement: forehead lines, crow's feet, glabella, masseter slimming, brow lift and underarm sweating. Good planning starts from a whole-face assessment rather than filling only the spot the patient points at, because balance comes from distributing volume sensibly, not from maximising one area.

On longevity, Botox (Allergan) typically holds 3–4 months for wrinkles and 4–6 months for the masseter. It fades sooner with a fast metabolism, frequent intense exercise, smoking, highly mobile areas such as lips and perioral skin, and under-dosing relative to what the face actually needs. It lasts longer with correct plane placement, a sub-model matched to local tissue pressure, and a top-up before the effect disappears completely.

Who it suits: first-timers who want the most heavily documented brand, people who have responded poorly to budget toxins, and anyone who values predictability over repeated cycles.

Not suitable or best avoided: people with neuromuscular disease such as myasthenia gravis, those optimising purely for the lowest price, and anyone expecting a permanent result. This also covers pregnancy and breastfeeding, active infection at the injection site, and any known allergy to the product's components.

Thailand versus Korea: reference market pricing runs about 12,000–18,000 บาท per 100 units in Thailand and roughly 8,000–14,000 บาท per 100 units in Korea. The average gap is roughly 25–35%, about 4,000 baht per vial. The honest comparison includes travel cost — flights, accommodation, interpreting and time. For a single small treatment the gap rarely covers a trip; combined with several procedures in one visit, the difference starts to matter.

The question worth asking is the dilution ratio: one 100-unit vial can be reconstituted with anything from 1 to 4 ml of saline. Clinics quoting unusually cheap per-area prices often dilute beyond standard, so you receive fewer real units and the effect fades early. Compare on units delivered, never on the number of injection points.

Safety and authenticity: Reported side effects include eyelid or brow ptosis, headache and minor bruising, usually resolving within two to eight weeks. Before treatment, ask to see the sealed box and label, check the registration number against Thailand's FDA or Korea's MFDS, photograph the lot number and expiry, and have the doctor open the product in front of you. A price far below market is usually a sign of unregistered stock or over-dilution.

Bottom line: Botox (Allergan) is worth it when it is matched to a real concern, injected by a doctor who reads the whole face, and understood as a temporary result that needs maintenance rather than a one-off fix. Compare prices per unit or per cc of registered product — never a promotional price against a standard one.