 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  children, dosage is also based on weight. Unless your doctor instructs you otherwise, drink plenty of fluids while using this medication. This helps to reduce some of the side effects to the kidneys.The side effects of Vincasar PFS Intravenous: See also Warning section. Nausea, vomiting, weight loss, diarrhea, mouth sores, dizziness, or headache may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. This medication can also cause constipation, which in some cases may become serious. Consult your doctor or pharmacist about how you can prevent constipation (such as eating a diet high in fiber, drinking enough water). Ask about regularly using a stool softener such as docusate, avoiding bulk-forming laxatives, and choosing a stimulant laxative. Tell your doctor or pharmacist promptly if you develop constipation, stomach/abdominal pain, or bloating. Temporary hair loss may occur. Normal hair growth should return after treatment has ended. People using this medication may have serious side effects. However, you have been prescribed this drug because your doctor has judged that the benefit to you is greater than the risk of side effects. Careful monitoring by your doctor may </s>