If 100 units of Botox is injected as opposed to 50, will the effects last longer? (Photo)

Hello, Thank you for your question.Typically the dose administered is based on your muscles' strength, activity, and density. It is improve that you receive the proper dose to relax these muscles; however, doubling your dose doesn't necessarily leads to a longer lasting treatment. Having routine treatments over a long duration of time, may make your results last longer. I recommend you book a consultation with a
qualified injector, to ensure you're a good candidate for this procedure.Take care. 

When dealing with very small doses, there is an increased duration of effect as the dose of drug is administered increases.  However there comes a point at which injecting more Botox will not increase the longevity.  There are some botulinum toxin products that

The number of units of Botox used controls how much the muscles will be relaxed, and to some extent how long the effects will last. It is very important to inject the amount of units necessary for the desired effect. Injecting too many units may result in an unflattering “frozen” look, could lead to unwanted side effects, and will last a bit longer but not twice as long. The only time I recommend using more units is to treat sweating. The more units you inject into the armpits or palms, the longer you do not sweat. The way to get the best results from Botox is to visit a skilled, board-certified dermatologist with experience injecting neuromodulators.