 <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] cription/herbal products (such as antacids, laxatives, vitamins) because they may contain calcium, magnesium, phosphate, or vitamin D. Ask your pharmacist about using those products safely. Vitamin D is very similar to calcitriol. Do not use medications containing calcitriol while using vitamin D. This vitamin may interfere with certain lab tests (such as cholesterol tests), possibly causing false test results. Make sure lab personnel and all your doctors know you use this vitamin. Does Thera-D Tablet interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Thera-D 4000 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. Symptoms of overdose may include: seizures, confusion, irregular heartbeat.  Notes Lab and/or medical tests (such as calcium/magnesium/phosphorus levels) should be done while you are taking this medication. Keep all medical and lab appointments. Consult your doctor for more details. Foods rich in </s>