Is it okay if I take high dosage of Accutane?

Ive been on curacne(accutane) for 45 days I am taking 40mg per day my weight is 57 my dermatologist told me to continue this medicine for 5months but as what I read there's have a duration for 8400mg per patient so I calculate the medecine that I'm taking up until 5months will not be consume for the duration any advice I need a help. Thank you t ok if I take high dosage of curacne?

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