Botox wears off in 2 weeks, advice?

If the Botox is ineffective, there are several possibilities, looking at all three factors involved: the botox, the provider, and the patient. The botox, may be weak, diluted or old. The provider may have injected improperly or inadequate amounts, trying to stay within a specific budget.  But most commonly, the patient may not be the ideal candidate for the treatment chosen and perhaps he/she should consider more invasive maneuvers. If one's deep frown lines and lifting are no longer able to be accomplished by injectables (filler and/or botox) , the patient may likely need to consider facial surgery.

This isn't typical. Botox results resolve in 3-4 months. Additional Botox may be needed or a combination of Botox with fillers, lasers and microneedling/prp may give the most improvement. Best, Dr. Emer

My goal is for my patients Botox/Dysport/Xeomin to last three months , give or take a bit. Two weeks sounds odd. Sometimes is related to dose but you had plenty and would not increase dose. You might try Xeomin or Dysport and see how that does.