Every Rav will have there own views regarding specific medications.
I was just listening to a shiur, and as a side point the speaker mentioned that R. Y.B. Solevetchick’s view on this topic was that one MUST take prescription medications; one MAY take over the counter medications to relieve a very oppressive condition that makes it difficult to function over shabbos; one MAY NOT take over the counter medications merely to relive discomfort such as an ordinary headache, minor cold, ect.
Again, every Rav has his own specific rulings.