 <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] ulfamethoxazole, zidovudine) or other drugs that may cause kidney problems (such as cyclosporine). Your doctor or pharmacist will monitor you closely and adjust your medications to decrease your risk of serious side effects. Valganciclovir is very similar to ganciclovir. Do not use medications containing ganciclovir while using valganciclovir. Does Valganciclovir HCL interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Valganciclovir Oral: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.  Notes Do not share this medication with others. Lab and/or medical tests (such as complete blood count, kidney function, eye exams) should be done while you are taking this medication. Keep all medical and lab appointments. Consult your doctor for more details.  Missed Dose If you miss a dose, take it as soon as </s>