Minoxidil: Uses, Dosage, Side Effects, Warnings

Minoxidil, whose chemical name is 6-(1-piperidinyl)-2,4-pyrimidinediamine-3-oxide, is an organic substance that is white or off-white crystalline powder. Clinically, as a potassium channel opener, it can directly relax vascular smooth muscle, and has a powerful small arterial expansion effect, which reduces peripheral resistance and blood pressure without affecting the volume of blood vessels, so it can promote venous return. At the same time, due to reflex regulation and positive frequency effects, cardiac output and heart rate can be increased, but it does not cause orthostatic hypotension.

1.Minoxidil Powder can stimulate the proliferation and differentiation of hair follicle epithelial cells: the normal human hair follicle epithelial cells in different concentrations of minoxidil solution in the micro-molar concentration of minoxidil can stimulate hair follicle epithelial cell proliferation.

2.Minoxidil Powder can promote angiogenesis: increase the local blood supply: hair growth depends on the hair nipple blood supply network nutrition, hair in the different growth cycle, vascular endothelial growth mRNA expression is different from the growth of vascular endothelial growth mRNA in the dermis Nipple cells were strongly expressed, but were less expressed during retrograde and resting periods.

3.Minoxidil Powder can open potassium channels: potassium channel opening is an important step in regulating hair growth, animal models in vitro and in vivo experiments have shown that minoxidil is a potassium channel activator, can increase the permeability of potassium ions to prevent calcium ion flow Intracellular, resulting in decreased free calcium concentration in cells, while calcium ions, epidermal growth inhibit hair growth.

Minoxidil can be used for refractory hypertension and renal hypertension, the antihypertensive effects of hydralazine stronger than that. Mechanism for the K + channel opening, so that vascular smooth muscle. it Is a vasodilator antihypertensive drug classes. Does not cause orthostatic hypotension, no long-term efficacy of medication.
Minoxidil was the first drug approved b for the treatment of androgenetic alopecia (hair loss).Before that, minoxidil had been used as vasodilator drug prescribed as oral tablet to treat high blood pressure that included hair growth and reversal of male baldness.
We offer a wide range of minoxidil solutions:
The content is female (2%, 3%), unisex (5%), and men (15%);

External Use (Hair Loss Treatment)

Male: A concentration of 5% is recommended (1-2 times a day).

Women: Usually, a 2% concentration is used (twice a day), while some guidelines allow a 5% concentration (under the guidance of a doctor).
Single dosage: 1ml each time (approximately 6 sprays), apply evenly to the affected area of dry scalp.
Usage frequency: 1-2 times a day (with an interval of at least 8 hours).
Course of treatment: It will take effect for at least 3 to 6 months and needs to be maintained for a long time (the effect will gradually disappear after stopping the medication).

Oral Administration (Hypertension Treatment)

Initial dose: 5mg per day, taken in 1-2 divided doses.

Maximum dose: 40mg/ day (Use only under close medical monitoring).
Applicable population: Only for patients with severe hypertension who have no response to other antihypertensive drugs.

1.External use side effects (mainly local reactions)

Scalp irritation

Symptoms: Itching, burning sensation, erythema, desquamation (incidence rate approximately 7%-10%).
Countermeasure: Reduce the frequency of use (such as once a day), and use it with a mild shampoo.

Hypertrichosis

Manifestation: Increased hair growth in non-target areas (such as the face and neck) (more common in women).
Treatment: Adjust the application area to prevent the medicine from contaminating other parts.

Shedding Phase

Mechanism: The drug promotes premature hair loss during the resting phase, making room for new hair.

Time: It usually starts 2 to 8 weeks after use and gradually recovers after 2 to 4 weeks.

2.Oral side effects (with a higher systemic risk)

Cardiovascular reaction

Hypotension: Dizziness, fatigue, and even fainting (blood pressure needs to be monitored).

Tachycardia: A reflexive increase in heart rate (alleviated when used in combination with beta-blockers).

Fluid Retention

Symptoms: Edema in the lower extremities, weight gain (diuretics are required in combination).

Rare severe reaction

Pericardial effusion: Long-term high-dose use may induce it (echocardiography monitoring is required).

Taboos and Precaution

Taboo groups

Pregnant and lactating women: May affect fetal development or breast milk secretion.
Scalp damage or inflammation (such as eczema, dermatitis) : increases the risk of irritation.
People allergic to minoxidil or propylene glycol (some formulas contain propylene glycol).

Herb-Drug Interaction

Oral antihypertensive drugs: To enhance the antihypertensive effect, the dosage needs to be adjusted.

Other local medications: Avoid concurrent use with irritating products (such as salicylic acid, tretinoin).

Olsen, E. A., et al. (2007)
A randomized clinical trial of 5% topical minoxidil versus 2% topical minoxidil and placebo in the treatment of androgenetic alopecia in men.
Journal of the American Academy of Dermatology, 57(5), 767-774.
DOI: 10.1016/j.jaad.2007.06.007

Perera, E., & Sinclair, R. (2013)
Treatment of chronic telogen effluvium with oral minoxidil: A retrospective study.
F1000Research, 2, 146.
DOI: 10.12688/f1000research.2-146.v2

American Academy of Dermatology (AAD) Guidelines (2019)
Guidelines of care for androgenetic alopecia.
Journal of the American Academy of Dermatology, 80(1), 305-306.
DOI: 10.1016/j.jaad.2018.07.062