Ivermectin is available by prescription from Walgreens via Goodrx for $34.00. Prophylaxis must be executed within 48 hours from the advent of fever and/or cough to be fully effective. 20 tabs @ 3 mg each. Most drs. in my area are fully versed on its useage. Dr. Zelenko in NewYork has had dramatic results prescribing HCQ and Ivermectin. Google his name.