Sitagliptin phosphate tablets can be taken half a tablet at a time, which usually does not affect the effectiveness of the drug, but the specific dosage needs to be determined under the guidance of the doctor according to the condition. Sitagliptin Phosphate Tablets are designed to exert a hypoglycemic effect by enhancing insulin secretion and inhibiting glucagon secretion. The drug can be used alone or in combination with metformin, along with dietary control and exercise, to improve blood sugar in patients with type 2 diabetes. Sitagliptin phosphate tablets are regular tablets, not extended-release or enteric-coated. Breaking it up will not affect the effectiveness of the medicine, and you can take half a tablet at a time if your condition requires it. The exact dose of selegiline phosphate tablets should be decided according to the patient’s condition. If the blood sugar is too high, the dose needs to be increased or combined with other hypoglycemic drugs. If the blood sugar is low, the dose needs to be reduced. Therefore, the exact amount of the drug to take is decided by the doctor according to the patient’s specific condition. In addition, the dosage of selegiline phosphate tablets needs to be determined according to the patient’s renal function. For mild renal insufficiency, there is no need to adjust the dosage of the drug; for moderate renal insufficiency, the maximum dosage is 50mg per day, or half a tablet if it is in the dosage form of 100mg tablet: for severe renal insufficiency, the maximum dosage is 25mg per day. Therefore, whether selegiline phosphate tablets can be taken half a tablet at a time should be decided under the guidance of a doctor according to the patient’s specific condition.