Losartan is a medication commonly used to treat high blood pressure and other conditions. When considering the dosage of losartan in relation to a patient's weight in kilograms, it is essential to note that the drug's side effects are typically not directly linked to the patient's weight. The sources provided, including Drug Patent Watch [1], a study published on the National Center for Biotechnology Information [2], and a publication on PubMed [3], do not specifically mention any side effects of losartan that are dependent on the patient's weight in kilograms. However, it is crucial to follow the prescribed dosage and consult with a healthcare provider to monitor for any potential side effects or interactions based on individual health conditions and other medications being taken.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LOSARTAN
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9101101/
[3] https://pubmed.ncbi.nlm.nih.gov/10070166/