The typical Lasix dosage for high blood pressure is 80 mg, usually divided into two doses (40 mg twice a day). Your healthcare provider may adjust your dose until your blood pressure is at the desired goal, which can be different for each person. Detailed Furosemide dosage information for adults and children. Includes dosages for Hypertension, Edema, Congestive Heart Failure and more; plus renal, liver and dialysis adjustments. Dosing The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so. The dose may be raised by 20 or 40 mg and given not sooner than 6 to 8 hours after the previous dose until the desired diuretic effect has been obtained. The individually determined single dose should then be given once or twice daily (eg, at 8 am and 2 pm). Detailed dosage guidelines and administration information for Lasix (furosemide). Includes dose adjustments, warnings and precautions. The typical starting dosage of furosemide for adults with high blood pressure is 40 mg twice per day. Your doctor may adjust your dosage based on how you respond to the medication. Recommended Dosage of Furosemide (Lasix) The recommended initial dosage of furosemide is 20-80 mg given as a single oral dose for adults with edema, with dose adjustments based on clinical response. 1 Find patient medical information for Furosemide (Lasix) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Medscape - Hypertension-specific dosing for Lasix, Furoscix (furosemide), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and. Furosemide belongs to a class of drugs called diuretics. Furosemide is available in a brand-name version. This article describes the dosages of furosemide, its strengths, and how to take it.