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Therefore, reducing MAO-B results in higher quantities of L-DOPA in the striatum. [3] Similarly to dopamine agonists, MAO-B inhibitors improve motor symptoms and delay the need of taking levodopa when used as monotherapy in the first stages of the disease, but produce more adverse effects and are less effective than levodopa.
Selegiline acts as a monoamine oxidase inhibitor (MAOI) and thereby increases levels of monoamine neurotransmitters in the brain. [17] [11] [28] [5] At typical clinical doses used for Parkinson's disease, selegiline is a selective and irreversible inhibitor of monoamine oxidase B (MAO-B), increasing brain levels of dopamine.
[35] [29] However, the pathophysiology of Parkinson's disease is complex and multifacted, and MAO-B inhibitors may only slow the progression of the disease and do not halt it. [35] [29] The MAO-B inhibition by oral selegiline shows dosage dependence at typical therapeutic doses and below (i.e., ≤10 mg/day).
Monoamine oxidase inhibitors (MAOIs) are a class of drugs that inhibit the activity of one or both monoamine oxidase enzymes: monoamine oxidase A (MAO-A) and monoamine oxidase B (MAO-B). They are best known as effective antidepressants , especially for treatment-resistant depression and atypical depression . [ 1 ]
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Guanfacine has been researched for treatment of a variety of conditions impacting prefrontal cortex function, including cognitive and attentional problems in people with traumatic brain injury, stroke, schizophreniform disorders, and the elderly. [18] [69] Guanfacine is being studied for the possible treatment of long COVID. [70] [71] [72]
Levothyroxine is a frequently prescribed drug in the United States, particularly for older people, as lower thyroid function can be associated with aging. Questions remain over how appropriately ...
Safinamide is contraindicated in people with severe liver impairment, with albinism, retinitis pigmentosa, severe diabetic neuropathy, uveitis and other disorders of the retina. Combination with other monoamine oxidase (MAO) inhibitors and pethidine is also contraindicated. [4] It is not safe for women to take during pregnancy. [5]