Can I take 1-2 TBSP castor oil everyday for a week/month?

I was wondering if I could take castor oil everyday for a week to a month. I get great results of parasites/slime/?unidenified stuff with this where they stay in me taking meds and I haven't noticed many being passed lately. I also want to get another stool O/P when I do this because they are so visible but wonder if the lab will reject them because of the oil mixture. The only time I pass good specimens is when I'm not collecting and sorting. The lab refused anything that has had water or urine touch it. The lab will only take specimen with in hours of collection and that is sometimes very inconvenient for me. Will daily castor oil get rid of a Tapeworms head?
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