Yes those side effects are normal ,take times for your body to get used to,what I do instructed by my dr is titrate in other works adjust the dosage as tolerated increasing day by day,maybe half dosage the first week and then increasing or increase or decrease depending on how the dr recommended to you,need to ask first on how to start from the lower dosage then increased depending on how your body tolerated,ask your neurosurgeon about how to increase and decrease and soon your body will get adjusted takes time but soon you will able to handle it,good luck and hope you are ok soon,your friend Jesika