Wow, The worlds full of really poor techs, as well as Vets.
Any Vet or decent tech, would know better then to prescribe controlled meds over the internet. In fact, find out who Goose works for and send the e-mail to the Vets there. I imagine, Goose will be looking for a job.
If your monitor is sick, take it to a Good reptile Vet. I am sure there are many in your area. They will do a fecal and then take whatever steps are needed.
Being is your monitor has been doing well in captivity for over a year, I feel its a far better bet to continue what your doing.
You need to understand, normal parasites are a NORMAL part of wild monitors lives. They get more parasites with nearly all meals in nature. In nature monitors do not have a problem. They live, grow, breed, etc. WITH PARASITES.
The problem occurs when you take a wild monitor with parasites and keep it in crappy conditions to a point it loses its immue system. Then the parasites overload(bloom) and take over the host. Remember, those parasites depend on the host living. They are not suppose to kill their host.
What kills the monitor is a compromised immue system, not parasites.
ALso parasites have a life cycle. They normally only exsist in the monitor for a realitively short period. Then they pass on to and intermediate host. The good part is, in captivity, there is no intermediate host. So your monitor soon rids itself of parasites. Some parasites can be passed back thru the monitor eating its own feces, don't let that happen(how simple is that?)
Which means, after a year, and if you take good care of your monitor(I assume you do, as you have had it a year) YOU DO NOT NEED TO HAVE IT WORMED. PERIOD.
As an example, I have generations upon generations of monitors. Of many many species, I never worm them, EVER. And I do not have problems.
You need to understand, worming monitors kept with good husbandry is totally needless. Then understand, worming monitors that are not kept with good husbandry, is also worthless, as they will simply die of something else. Its so very rare that worming is of actual value.
I know you will go ahead and worm your monitor, for the simple reason, you do not know what good husbandry is. So you want to hedge your bet. Its too bad, your betting with an animals life. Cheers