Does Seroquel help symptoms for glioblastoma brain cancer?

I take Seroquel (quetiapine) the IR formulation (immediate release) and yes, this antipsychotic will make you drowsy and very sleepy, although everyone reacts to medications differently.

Somnolence is considered a very common side effect affecting up to 57% of patients and sedation up to 18.3%.

With regards to your symptoms specifically with the loss of appetite, weight gain is considered a very common side effect affecting up to 54% of people being treated with Seroquel.

Now, your other symptoms, I am not a medical professional, and most likely they will not improve, for example blurred vision (to name one), I experience it sometimes when waking up and for me it lasts about 45 minutes and it is a very common side effect, also vomiting is a very common side effect, I mean all these are potential side effects that must be listed by the Pharmaceutical Co. to protect itself for not informing patients what they may experience, it does not mean one will experience them all, it is to avoid potential lawsuits.

I do not know if you have ever taken this type of medication, but antipsychotics make one tired some people can not handle it, again everyone is different, not trying to scare you just being realistic and speaking from experience.

I have been on Seroquel since I was 34 y/o, I am 54 y/o now, and it has been a great medication for me. I must say it has been hard, specially at the beginning to control my appetite, being sleepy and tired all the time, but in time I did manage to deal with this very potent medication and side effects, I eat very healthy and exercise 5 days a week.
Also hyperglycemia is a known side effect of antipsychotics one has to watch out for and have blood work done every few months.

The bottom line is that this is a great medication for some, it is not for everyone and in my opinion and after being on this medication for 20 years for bipolar disorder, yes it may help you gain weight and will most likely make you sleepy and tired but will not truly help you with your symptoms.

I am not being negative or trying to scare you. I know what the symptoms Glioblastoma are and being realistic, this is not the medication for you.

Yes, there is growing evidence of the value of certain antipsychotic medications, including Seroquel,(quetiapine) as adjunct therapy in managing glios.
"In short, based on various preclinical and clinical studies, anti-psychotic drugs hold substantial therapeutic value not only in the modulation of psychotic symptoms and seizures, but more importantly, as potential anti-neoplastic and adjuvant agents in glioma management. Hence, extensive preclinical and clinical studies would further strengthen the evidence of their therapeutic efficacy and repurpose their use in human glioma management."
"Very common (10% or more of users): SOMNOLENCE (up to 53%), SEDATION (up to 31.9%), dizziness (up to 18%), headache (up to 17.5%), extrapyramidal symptoms (up to 11.2%)"
Best regards and I hope this information is helpful.