The phrase "to increase the dosage" means to take a larger amount of a medication or substance than before.
Sentences with «to increase the dosage»
Only increase the dosage of the product according to product recommendations, and never consume more than the maximum recommended dosage. (bodybuilding.com)
It is used almost exclusively after traditional drug therapy, even with increased dosage, proves ineffective. (cvm.ncsu.edu)
Pay attention to the results for a week, then gradually increase the dosage to no more than 4 tablespoons daily, in divided doses. (healingdaily.com)