I tried these last year. They don't really have a taste but I did notice that sometimes they tingled/burned when I used them.  The diet that goes with it is so restrictive though. 500 calories per day.

It definitely works.  I took off 50 lbs but gained much of it back within 8 months.  Difficult to maintain after you restart normal eating i.e. carbs.

I know several gals on the HCG diet.......we have discussed several factors.  #1--it is ONLY 500 calories per day--one should lose weight at NO problem w/o the drug added.  Some have injected-others used the drops.  ONE gal in particular had to phone her husband to come get her from Walmart(30 mi away) as she collapsed and couldn't hardly speak--she is 35 yrs old. She did recover--""I" personally wonder if it were a blood sugar drop. Another's hair is falling out and I mean FALLING out-she had lost 36# and easily 25 more to go!  There was a review of this diet by Dr Oz and he claimed there was NO control to how much HCG was in the drops....placebo effect perhaps.  Guess "I" believe in nutrition first........weight loss second!  I have lost 50# with Weight Watchers MANY yrs ago and maintained it for 10 yrs.....gained 30 back and lost it 15 yrs ago and SLOWLY gained 10 back....have successfuly lost that 10 with the 21 day diet.......which gets my KUDOS!  Good luck to you on your journey!