Know myself trying to convince my doctor,that my sons depression,insomnia and anxiety,came from this drug was impossible,so fired him. Use of this medication is not recommended in children less than 15 years old. Halozyme is biopharmaceutical company developing and commercializing products targeting the extracellular matrix for the endocrinology, oncology, dermatology and drug delivery markets. The primary endpoint was the mean maximum percent fall in FEV1 following the hours post-dose exercise challenge in all three studies Study A, Study B, and Study. Have seen an allergist, neurologist, GI specialist, family physician, physical therapist for the vertigo and have had countless medical procedures umbes singulair ranging from MRI to endoscopies. The clinical relevance of intranasal challenge studies is unknown. Over the years have had NUMEROUS problems including migraines, chronic vertigo, anxiety, severe insomnia, irritability, urticaria, hives, eczema, and all sorts of GI issues ranging from GERD to diarrhea.