Did your vet specifically refer to your baby's problem as coccidia? It kind of sounds like it may be that if he prescribed Albon ... Metronidizol (that may not be spelled correctly) could also be prescribed for coccidia.
It bears mentioning here that stress plays a key role in the development of coccidia. It is not uncommon for an otherwise healthy kitten to arrive at its new home and develop diarrhea several days later leading to a diagnosis of coccidia. The incubation period (from exposure to illness) is about thirteen days. If the kitten developed the symptoms shortly after coming to your home, then he/she had it before you brought this kitten home - if this baby has been with you for several weeks before developing symptoms, then the exposure most likely occurred after your kitten came to your home. Where did you get your kitten from? Did he/she have access or exposure to other animals which may be carriers? Does this baby have access to any other animals now? Does he/she go outside? Coccidia is normally contracted by grooming dirt which contains the feces of an infected animal from the fur.
Fortunately coccidia is treatable, however, it may be a very frustrating experience for both the kitten and for you. Drugs such as sulfadimethoxine (Albon) and trimethoprim-sulfadiazine (Tribrissen) have been effective in the treatment and prevention of coccidia. You should know that these drugs do not kill the organisms, but rather inhibit their reproduction capabilities - elimination of coccidia from the intestine is not a rapid thing. The drugs are used to stop the ability of the oocysts to reproduce, thus allowing time for the kitten's own immunity to develop and remove them. Drug treatments of five or more days are usually required, but in some persistant cases, treatment for up to a month may be prescribed.
Because coccidia is spread by the feces of carrier animals, it is very important to practice strict sanitation. You must remove soiled litter and thoroughly wash litter boxes several times per day and all fecal material should be removed from your home frequently. You need to make sure that food and water cannot become contaminated with feces. Clean water should be provided at all times. Most disinfectants do not work well against coccidia; incineration of the feces, and steam cleaning, immersion in boiling water or a 10% ammonia solution are the best methods to kill coccidia. Coccidia can withstand freezing.
Cockroaches and flies can carry coccidia from one place to another. Mice and other animals can ingest the coccidia and when killed and eaten by a cat, for instance, can infect the cat. Therefore, insect and rodent control are very important in preventing coccidia.
I share your frustration - it isn't easy to deal with a kitten who is always sick. But know that your diligence and excellent care are the best ways to kick this problem.