There are 21 non-randomised studies that have focused on a particular medical condition or set of conditions. References to these studies are listed below:
Ammerschlager H, Klein P, Weiser M, Oberbaum M (2005). Behandlung von Entzündungen im Bereich der oberen Atemwege – Vergleich eines homöopathischen Komplexpräparates mit Xylometazolin [Treatment of inflammatory diseases of the upper respiratory tract – comparison of a homeopathic complex remedy with xylometazoline]. Forschende Komplementärmedizin und Klassische Naturheilkunde; 12: 24–31.
Derasse M, Klein P, Weiser M (2005). The effects of a complex homeopathic medicine compared with acetaminophen in the symptomatic treatment of acute febrile infections in children: an observational study. Explore (NY); 1: 33–39.
Friese K-H, Kruse S, Lüdtke R, Moeller H (1997). The homoeopathic treatment of otitis media in children – comparisons with conventional therapy. International Journal of Clinical Pharmacology and Therapeutics; 35: 296–301.
Goossens M, Laekeman G, Aertgeerts B, Buntinx F (2009). Evaluation of the quality of life after individualized homeopathic treatment for seasonal allergic rhinitis. A prospective, open, non-comparative study. Homeopathy; 98: 11–16.
Haidvogl M, Riley DS, Heger M, et al (2007). Homeopathic and conventional treatment for acute respiratory and ear complaints: a comparative study on outcome in the primary care setting. BMC Complementary and Alternative Medicine; 7: 7.
Hubner R, van Haselen R, Klein P (2009). Effectiveness of the homeopathic preparation Neurexan compared with that of commonly used valerian-based preparations for the treatment of nervousness/restlessness – an observational study. Scientific World Journal; 9: 733–745.
Klopp R, Niemer W, Weiser M (2005). Microcirculatory effects of a homeopathic preparation in patients with mild vertigo: an intravital microscopic study. Microvascular Research; 69: 10–16.
Müller-Krampe B, Oberbaum M, Dipl-Math PK, Weiser M (2007). Effects of Spascupreel versus hyoscine butylbromide for gastrointestinal cramps in children. Pediatrics International; 49: 328–334.
Rabe A, Weiser M, Klein P (2004). Effectiveness and tolerability of a homoeopathic remedy compared with conventional therapy for mild viral infections. International Journal of Clinical Practice; 58: 827–832.
Schmiedel V, Klein P (2006). A complex homeopathic preparation for the symptomatic treatment of upper respiratory infections associated with the common cold: An observational study. Explore (NY); 2: 109–114.
Schneider C, Klein P, Stolt P, Oberbaum M (2005). A homeopathic ointment preparation compared with 1% diclofenac gel for acute symptomatic treatment of tendinopathy. Explore (NY); 1: 446–452.
Schneider C, Schneider B, Hanisch J, van Haselen R (2008). The role of a homoeopathic preparation compared with conventional therapy in the treatment of injuries: an observational cohort study. Complementary Therapies in Medicine; 16: 22–27.
Schröder D, Weiser M, Klein P (2003). Efficacy of a homeopathic Crataegus preparation compared with usual therapy for mild (NYHA II) cardiac insufficiency: results of an observational cohort study. European Journal of Heart Failure; 5: 319–326.
Walach H, Lowes T, Mussbach D, et al (2001). The long term effects of homeopathic treatment of chronic headaches: one year follow-up and single case time series analysis. British Homeopathic Journal; 90: 63–72.
Waldschütz R, Klein P (2009). The homeopathic preparation Neurexan vs. valerian for the treatment of insomnia: an observational study. Scientific World Journal; 8: 411–420.
Witt CM, Lüdtke R, Baur R, Willich SN (2009). Homeopathic treatment of patients with chronic low back pain: a prospective observational study with 2 years’ follow-up. Clinical Journal of Pain; 25: 334–339.
Witt CM, Lüdtke R, Willich SN (2009). Homeopathic treatment of chronic headache (ICD-9: 784.0) – a prospective observational study with 2-year follow-up. Forschende Komplementärmedizin; 16: 227–235.
Witt CM, Lüdtke R, Willich SN (2009). Homeopathic treatment of patients with chronic sinusitis: a prospective observational study with 8 years follow-up. BMC Ear Nose and Throat Disorders; 9: 7.
Witt CM, Lüdtke R, Willich SN (2009). Homeopathic treatment of patients with dysmenorrhea: a prospective observational study with 2 years follow-up. Archives of Gynecology and Obstetrics; 280: 603–611.
Witt CM, Lüdtke R, Willich SN (2010). Homeopathic treatment of patients with migraine: a prospective observational study with a 2-year follow-up period. Journal of Alternative and Complementary Medicine; 16: 347–355.
Witt CM, Lüdtke R, Willich SN (2009). Homeopathic treatment of patients with psoriasis – a prospective observational study with 2 years follow-up. Journal of the European Acadamy of Dermatology and Venereology; 23: 538–543.