My red dragon has developed some ich and trying to scratch imself off the rocks. In addition, his fins are like to his side, so he has some bad parasite. What medicine can i get, I am going to the store in a couple hours.

IMO "Quick Cure" IS THE BEST!

i believe it's not ich... well i might be wrong.
read this, hope this helps...

* Flukes *
DISEASE FLUKES - Highly contagious external parasites belonging to the classes Trematoda and Cestoda species in the family Dactylogyridae parasitise the gills and digestive tract.

SYMPTOMS- Fishes show signs of extreme skin/gill irritability, continually scratching and scraping on rocks etc., and "flicking" the pelvic and dorsal fins against the side of the body. Gill plates are clamped or close tight or not functioning when breathing.

TREATMENT- Do 75% water change and treat the tank with formalin (Quick Cure, Formalite III and Livebearer) Feed sparingly and wash all filtrations. These diseases are extremely contagious.

PREVENTION- Maintain a much higher standard of aquasystem hygiene. Water change, water change and more water change. Always quarantine doubtful looking fish. Avoid cross-tank contamination. Washing hand with anti-bacterial soap before or after touching sick or dead fish.

I would get Jungle parasite clean, it will take care of the ick and if it's a parasite it will clear that up too and does not interfer with your good bacteria.