You can get a prescription from Pushhealth.com and get it mail order from various pharmacies in the US. There will be about a $70 for the Rx script to be sent to one of several pharmacies. $100 for the Ivermectin.
If you get it from India, the Ivermectin seems to be priced the same without the Rx.
If IVM costs that much even w/o a prescription, I’ll still go to Tractor Supply for the $6.99 10-dose apple-flavored horse paste tube.
Prices vary quite a bit. Reliable suppliers can deliver a standard box of 100 units of 12mg Ivermectin for $60-$80 - including shipping via USPS. About 5-8 days for delivery. The units are blister-packed in groups of 10 tablets, which is the standard convention for such items in India.
The medication is considered "over-the-counter" in India and does not require prescription. It is in common use to control parasite infections. There are dozens of high-quality manufacturers.
A 250-pound adult dose is 24mg. So about $1.80 per dose. Patients with parasite infections often get doses every other day for several days. I have heard of ranchers and veterinarians in this country, who work with livestock and take preventive doses every few months.
Paying more than around $100 is a gouge in my opinion. The domestic price in India appears to be less than one fourth of that.