 <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]  amount of drug in your body is kept at a constant level. Take this drug at evenly spaced intervals. To help you remember, take it at the same time(s) each day. Continue taking this medication exactly as prescribed by your doctor. Do not change your dose or stop taking it even for a short time unless directed to do so by your doctor. Changing or skipping your dose without approval from your doctor may increase the risk of side effects or make the infection worse. Do not take ganciclovir instead of valganciclovir on your own without consulting your doctor or pharmacist. The effects and the dosages of ganciclovir and valganciclovir are not equal. Keep all medical and laboratory appointments. Tell your doctor if your condition worsens (such as worsening vision).The side effects of Valganciclovir Oral: See also Warning section. Diarrhea, upset stomach, dizziness, drowsiness, unsteadiness, or shaking (tremors) may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. </s>