First, if your seeing a convulsion it would be a serious health issue, nothing that anyone here or any place on the internet can perscribe a medication of any kind for. Unless you have experience with dosage requirements, or you know exactly what the actual problem is, and that the medication will in fact improve the situation without any negative health issues, you should never give medication (this is why it requires a vet to perscribe meds).
Next, reading down further on your next responce to HH, you said that several days later your monitor has not passed a pinky and a cricket it ate. If your small young monitor has not passed a pinky mouse and a cricket aftyer a few days you have a serious problem. A semi healthy monitor of any species or size that eats a single pinky and a cricket or a few even should pass them the next day (I have hatched ackies that could eat pinkies after a day or so old, they pass part of them in less than 12 hours, and are eating more and more by that next day).
Finally, how do you know the age of a bosc monitor?
Why do I ask? Simple, there are a total of a few captive breedings of the bosc monitors in the US and Europe in the last 15 years, and none in recnt history, in fact the last sucessful breeding and hatching was from a guy who is starting over with young animals, none breeding. Also, if you bought a CBB monitor (unless it was a yellow ackie) you would spend about $200-$1000 plus depending on species (this just pays for the costs involved with keeping them properly and allowing them to reproduce).
Something about WC monitors, when you see a hatchling in a petstore or a reptile show, that animal is anywhere from 2-5 times the age or more than they are telling you, or that you assume it is. Yes, its common place for wholesalers, and retailers to keep them barely alive to sell them next year as "this years hatchlings", welcome to the reptile industry.
If you see a comvulsion, or something similar, you should consider seeing the vet, if it happens agian, you should see one definitely.
Until then you need to focus on what needs redesigned or changed to allow your monitor to pass its food is a proper time, after all a small prey item in a few days not digested can rot in the gut causing it to poison the animal, and cause symptoms that look like convulsions sometimes.

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