Howdy Tricia,
So to summarize things:
It's ok to give both of those parasite drugs at the same time.
With chameleons, most of the time, Albon has side effects making them listless and with a lowered interest in feeding. Albon works at helping to eliminate Coccidia but in some chameleon cases it doesn't seem to be able to fully complete the job during the usual treatment schedule (if ever). Most vets will still swear by it because it works well enough with other many other reptiles and most mammals.
Ponazuril has been around a while but it didn't really break into the USA chameleon keepers' world until recently. It's not quite a Silver Bullet but it has a high success rate and with minimum, if any, side effects.
Ponazuril:
Typically compounded (diluted by the pharmacist) to a strength of 60mg/ml.
Dosed at 30mg/kg of chameleon body weight.
For example, if your chameleon weighs 100 grams then you would dose him at 0.05ml of that strength of liquid Ponazuril. That's an easy amount to measure using a typical diabetic syringe whose entire length holds a volume of 0.5ml. A 0.05ml dose is 1/10 of the length of that syringe.
A treatment schedule of one dose every day for 3 days and repeat after 7 days has been found to be effective. You'll want to do a couple of follow-up fecal tests, maybe the first fecal test one a week after all treatments have finished and again maybe a month after all treatments have finished. If you still find Coccidia after any of those post-treatment tests, you will want to continue treatment for more weeks. We can talk about that if he is still infected

.
With a prescription phoned-in, Diamondback Drugs in AZ sells 30ml for about $23 + ~$4 shipping (buying less than 30ml doesn't necessarily cost less either). That's 600 doses

. I'm sure you'll make some new friends in FL

. It is ok to buy it as a more diluted compound if you want to have a larger volume (easier to measure small doses) to work with. If the dilution factor is doubled then the dose volume is doubled and so on.
Panacur:
It has a wide safety margin (hard to overdose to a danger level) for treating pinworms.
Paste is often sold at a strength of 100mg/gram (each gram of paste has 100mg of med). A weight of 1 gram of Panacur happens to have a volume about 1ml so it is easy to measure using a syringe.
It has a very simple dosing rate of 1ml/kg of chameleon weight.
Example: 0.1ml of paste is a dose for a 100 gram chameleon.
There are lots of dosing schedules. Once a week for 3 weeks is one that is often sited. Another is dose once a day for 3 days and repeat in 2 weeks. The basic idea is to sterilize the pinworms and any that hatch in order to break the life-cycle.
The part about "husband says he read it is FATAL in babies and JUVENILES"; was he referring to bleach or Coccidia

? If left untreated it can be fatal. Bleach should never be used with a chameleon still present. If you still smell bleach then you need more rinsing and dry-out time. Bleach kills most parasites but not necessarily Coccidia (see earlier post about H2O2). Whatever you use to kill parasites, physical agitation (spray with a hose) combined with soapy water will allow you to remove them from your chameleon's living environment. Take everything outside and blast it with water before and after soaping. Use whatever parasite killing product after washing things.
What did I forget

?