My husband is 50 yrs old and has been diagnosed with PTB. He's taking Fixcom4. He can't eat well because his taste buds are like ruined by this medicine (according to him) that is why he cannot recover. He starts to feel muscle pain in his legs and some joints. Is this normal? He's taking 4 tabs 30 minutes before breakfast. He's taking it for 12 days now. What are the side effects of fixcom4?