A non-prescription medicated nasal spray can be used by sinusitis, hayfever, cold, allergy and rhinitis sufferers to relieve their symptoms. SinuSoothe, Sinus Buster and Sinol are being used as alternatives to over the counter decongestant and steroid nasal sprays.

Preparation

The ingredients in these nasal sprays are diluted in water to 2X (1 part per 100) or 3X (1 part per thousand) and labelled as homeopathic. However they are not true homeopathic medicines due to their high concentration of ingredients relative to traditional homeopathic formulas.

Uses

Nasal sprays such as Sinus Buster

Sinus Buster

Sinus Buster is a brand of nasal spray that is available over-the-counter in the United States. It is used to ease nasal congestion, sinus pressure, and sinus headache...

, SinuSoothe and Sinol are chosen by some patients in the U.S. to treat allergies, hayfever, rhinitis and sinusitis.
The manufacturers claim that they have no side effects, are completely safe and can be used regularly on a long term basis.
These claims have yet to be proven.
Manufacturers also claim that they do not cause rebound congestion.
The manufacturers also claim that their sprays treat the "underlying cause" of the condition, although this cannot apply to nasal growths such as polyps and tumors that require surgery.

Ingredients

SinuSoothe contains the ingredients cumin

Cumin

Cumin is a flowering plant in the family Apiaceae, native from the east Mediterranean to India. Its seeds are used in the cuisines of many different cultures, in both whole and ground form.-Etymology:...

 oil, cinnamon

Cinnamon

Cinnamon is a spice obtained from the inner bark of several trees from the genus Cinnamomum that is used in both sweet and savoury foods...

 oil, frankincense

Frankincense

Frankincense, also called olibanum , is an aromatic resin obtained from trees of the genus Boswellia, particularly Boswellia sacra, B. carteri, B. thurifera, B. frereana, and B. bhaw-dajiana...

 oil, ginger

Ginger

Ginger is the rhizome of the plant Zingiber officinale, consumed as a delicacy, medicine, or spice. It lends its name to its genus and family . Other notable members of this plant family are turmeric, cardamom, and galangal....

 oil, manuka

Leptospermum scoparium

Leptospermum scoparium is a shrub or small tree native to New Zealand and southeast Australia. Evidence suggests that L. scoparium originated in Australia before the onset of the Miocene aridity and dispersed relatively recently from Eastern Australia to New Zealand. It is likely that on arrival...

 oil, tea tree oil

Tea tree oil

Tea tree oil, or melaleuca oil, is a pale yellow colour to nearly clear essential oil with a fresh camphoraceous odor. It is taken from the leaves of the Melaleuca alternifolia, which is native to the northeast coast of New South Wales, Australia...

 and turmeric

Turmeric

Turmeric is a rhizomatous herbaceous perennial plant of the ginger family, Zingiberaceae. It is native to tropical South Asia and needs temperatures between 20 °C and 30 °C and a considerable amount of annual rainfall to thrive...

 oil. Collectively thousands of scientific studies have been carried out on these oils and published in medical journals. The ingredients have been clinically proven to have anti-allergenic, anti-septic and anti-bacterial, anti-fungal

Antifungal drug

An antifungal medication is a medication used to treat fungal infections such as athlete's foot, ringworm, candidiasis , serious systemic infections such as cryptococcal meningitis, and others...

, anti-histamine

Histamine antagonist

A histamine antagonist, commonly referred to as antihistamine, is a pharmaceutical drug that inhibits action of histamine by blocking it from attaching to histamine receptors.- Clinical effects :...

, anti-inflammatory

Anti-inflammatory

Anti-inflammatory refers to the property of a substance or treatment that reduces inflammation. Anti-inflammatory drugs make up about half of analgesics, remedying pain by reducing inflammation as opposed to opioids, which affect the central nervous system....

, analgesic

Analgesic

An analgesic is any member of the group of drugs used to relieve pain . The word analgesic derives from Greek an- and algos ....

, anti-viral

Antiviral drug

Antiviral drugs are a class of medication used specifically for treating viral infections. Like antibiotics for bacteria, specific antivirals are used for specific viruses...

, decongestant

Decongestant

A decongestant or nasal decongestant is a type of drug that is used to relieve nasal congestion.-Pharmacology:The vast majority of decongestants act via enhancing norepinephrine and epinephrine or adrenergic activity by stimulating the α-adrenergic receptors...

 and expectorant

Mucolytic agent

Mucokinetics are a class of drugs which aid in the clearance of mucous from the airways, lungs, bronchi, and trachea. Such drugs can be further categorized by their mechanism of action.* expectorants* mucolytic agents...

 properties.
Sinus Buster and Sinol both contain the ingredient capsaicin

Capsaicin

Capsaicin 2CHCH=CH4CONHCH2C6H3-4--3- ) is the active component of chili peppers, which are plants belonging to the genus Capsicum. It is an irritant for mammals, including humans, and produces a sensation of burning in any tissue with which it comes into contact...

. Capsaicin has been clinically proven to reduce substance P

Substance P

In the field of neuroscience, substance P is a neuropeptide: an undecapeptide that functions as a neurotransmitter and as a neuromodulator. It belongs to the tachykinin neuropeptide family. Substance P and its closely related neuropeptide neurokinin A are produced from a polyprotein precursor...

which causes pain and inflammation. Wether or not this effect is clinically significant is open to debate.
One study showed some evidence of their efficiacy, although more trials are needed.