Labetalol should be used with caution in lactating mothers, it is not certain how many hours after taking Labetalol that breastfeeding should not be done, it is usually recommended that breastfeeding should not be done until 5 to 7 half-lives or more after taking the medication. Labetalol instructions indicate caution for lactating mothers, but how long after taking the drug breastfeeding should not be breastfeeding is not specified. Pharmacokinetics of this product states that peak blood concentration is reached 2 to 4 hours after oral administration of the drug, the effect lasts for 8 to 12 hours, and the half-life of the drug is 6 to 8 hours. More than 5 to 7 half-lives are required to be safe. Labetalol can be used for all types of hypertension. Adverse reactions include dizziness, fatigue, gastrointestinal discomfort, asthma exacerbation, abnormal sensations, and postural hypotension. It is contraindicated in bronchial asthma, sick sinus node syndrome, II to III degree atrioventricular block, severe or acute heart failure, cardiogenic shock, and hypersensitivity to the product. It should be used rationally under the supervision of a doctor.