jeffers vet supply is on the web, also valley vet supply. jeffers snailmail is p. o. box 100, dothan alabama.
alternatively, if you are near a farming area, the local feed store probably has ivermectin injectable for cattle or swine – various brands. a 50 ml vial of 1% ivermectin sterile solution costs about thirty bucks at our local farm and ranch supply.
1% works out to 10 mg per ml. while you’re at the feed store, get a small (easier to measure small amounts) syringe to pull it from the vial – handy way to measure with pretty good accuracy. dosage levels can be found on the web. i have been using it on my dogs for years to prevent internal (worms) and external (fleas, ticks, etc) parasites. i use one ml per 100 pounds of dog. (a 15 pound dachshund gets 0.15 ml – orally – monthly. i draw the dose from the vial using the syringe with a needle, remove the needle and squirt the syringe down the dog’s throat.) it’s probably unwise for me to give medical advice about humans, but you’re a grownup, you can probably figure it out on your own.
if you clean up everything before and after with a cotton ball soaked in isopropyl alc. everything stays sterile. squirt a little iso through the syringe and needle too. i keep everything in a clean ziplock bag.