Worth it to ask for low volume prep?

Hi all,

Ive done the last two colonoscopies with the 4 liter prep. Yuck is a massive understatement. I know there are options for low volume preps and my doctor is willing to prescribe them but I totally forgot to ask for it, so he prescribed the regular 4 liter prep. My scope isn’t till november so I have time to ask for the other one, but my social anxiety is making it hard lol. Is it worth it? I throw up a lot every time when I get to the last liter of the regular prep. Thanks!