 <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]  best effect, take this antibiotic at evenly spaced times. To help you remember, take it on the same day(s) of the week and at the same time each day. Mark the days on the calendar when you need to take the medication. Continue to take this medication (and other TB medications) until the full prescribed amount is finished, even if symptoms disappear. Stopping the medication too early or skipping doses may allow the bacteria to continue to grow, which may result in a return of the infection and cause the infection to be more difficult to treat (resistant). Tell your doctor if your condition lasts or gets worse.The side effects of Priftin Oral: Stomach upset, nausea, vomiting, loss of appetite, or headache may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. This medication may cause urine, sweat, saliva, or tears to turn reddish. This effect is harmless and will disappear when the medication is stopped. However, dentures and contact lenses may be permanently stained. 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. Many people using this medication do not have serious side effects. Tell your doctor right away if </s>