Regaine for Men Extra Strength

Minoxidil 50 mg/ml (5%w/v).

Cutaneous Solution

Regaine for Men Extra Strength is indicated for the treatment of alopecia androgenetica in men.

Onset and degree of hair regrowth may be variable among users. Although trends in the data suggest that those users who are younger, who have been balding for a shorter period of time or who have a smaller area of baldness on the vertex are more likely to respond to Regaine for Men Extra Strength, individual responses cannot be predicted.

Men aged 18-65:

Hair and scalp should be thoroughly dry prior to topical application of Regaine for Men Extra Strength. A dose of 1 ml Regaine for Men Extra Strength cutaneous solution should be applied to the total affected areas of the scalp twice daily. The total dosage should not exceed 2 ml. If fingertips are used to facilitate drug application, hands should be washed afterwards.

It may take twice daily applications for 2 months or more before evidence of hair growth can be expected.

If hair regrowth occurs, twice daily applications of Regaine for Men Extra Strength are necessary for continued hair growth. Anecdotal reports indicate that regrown hair may disappear three to four months after stopping Regaine for Men Extra Strength application and the balding process will continue.

Users should discontinue treatment if there is no improvement after one year.

The method of application varies according to the disposable applicator used:

Pump spray applicator: this is useful for large areas. Aim the pump at the centre of the bald area, press once and spread with fingertips over the entire bald area. Repeat for a total of 6 times to apply a dose of 1 ml. Avoid breathing spray mist.

Extended spray-tip applicator: this is useful for small areas, or under hair. The pump spray applicator must be in place in order to use this additional applicator. Use in the same way as the pump spray.

Rub-on applicator: squeeze the upright bottle once to fill the 1 ml chamber to the black line. Invert bottle, dab on scalp, and spread Regaine for Men Extra Strength over the entire bald area until chamber is empty.

Children and the Elderly

Not recommended. The safety and effectiveness of Regaine for Men Extra Strength in users aged under 18 or over 65 has not been established.

Regaine for Men Extra Strength is contraindicated:

− in women

− in users with a history of sensitivity to minoxidil, ethanol, or propylene glycol

− in users with treated or untreated hypertension

− in users with any scalp abnormality (including psoriasis and sunburn)

− in users with a shaved scalp

− if occlusive dressings or other topical medical preparations are being used.

Before using Regaine for Men Extra Strength, the user should determine that the scalp is normal and healthy.

The patient should stop using Regaine for Men Extra Strength and see a doctor if hypotension is detected or if the patient is experiencing chest pain, rapid heart beat, faintness or dizziness, sudden unexplained weight gain, swollen hands or feet or persistent redness.

Patients with known cardiovascular disease or cardiac arrhythmia should contact a physician before using Regaine for Men Extra Strength.

Regaine for Men Extra Strength is for external use only. Do not apply to areas of the body other than the scalp

Hands should be washed thoroughly after applying the solution. Inhalation of the spray mist should be avoided.

Regaine for Men Extra Strength cutaneous solution contains alcohol, which will cause burning and irritation of the eye. In the event of accidental contact with sensitive surfaces (eye, abraded skin and mucous membranes) the area should be bathed with large amounts of cool tap water.

Regaine for Men Extra Strength contains propylene glycol, which may cause skin irritation.

Some patients have experienced changes in hair colour and/or texture with Regaine for Men Extra Strength use.

Users should be aware that, whilst extensive use of Regaine for Men Extra Strength has not revealed evidence that sufficient minoxidil is absorbed to have systemic effects, greater absorption because of misuse, individual variability, unusual sensitivity or decreased integrity of the epidermal barrier caused by inflammation or disease processes in the skin (eg. excoriations of the scalp, or scalp psoriasis) could lead, at least theoretically, to systemic effects.

Topical drugs, such as tretinoin or dithranol, which alter the stratum corneum barrier, could result in increased absorption of minoxidil if applied concurrently. Although it has not been demonstrated clinically, there exists the theoretical possibility of absorbed minoxidil potentiating orthostatic hypotension caused by peripheral vasodilators.

There is no evidence as to drug safety in human pregnancy nor is there evidence from animal work that it is free from hazard. Regaine for Men Extra Strength should not be used during pregnancy or lactation.

Based on the pharmacodynamic and overall safety profile of minoxidil, it is not expected that Regaine for Men Extra Strength would interfere with the ability to drive or operate machinery.

Several thousand patients have used topical minoxidil in clinical trials where a comparison with an inactive solution was made. Dermatological reactions (e.g. irritation, itching) occurred in patients using both solutions. This has been explained by the presence of propylene glycol in both the active and inactive solution.

Reactions reported in commercial marketing experience include: hypertrichosis (unwanted non-scalp hair including facial hair growth in women), local erythema, itching, dry skin/scalp flaking, and exacerbation of hair loss.

Some consumers reported increased hair shedding upon initiation of therapy with Regaine for Men Extra Strength. This is most likely due to minoxidil's action of shifting hairs from the resting telogen phase to the growing anagen phase (old hairs fall out as new hairs grow in their place). This temporary increase in hair shedding generally occurs two to six weeks after beginning treatment and subsides within a couple of weeks. If shedding persists (>2 weeks), users should stop using Regaine for Men Extra Strength and consult their doctor.

Particular attention was paid to body systems, such as cardiovascular and metabolic, which might have some relevance based on the pharmacology of minoxidil. There was no increased risk to users due to drug related medical reactions in these, or other, body system categories.

Users should stop using Regaine for Men Extra Strength if they experience chest-pain, tachycardia, faintness, dizziness, sudden unexplained weight gain, swollen hands or feet or persistent redness or irritation of the scalp. Rare cases of hypotension have been reported.

Increased systemic absorption of minoxidil may potentially occur if higher-than-recommended doses of Regaine for Men Extra Strength are applied to larger surface areas of the body or areas other than the scalp. There are no known cases of minoxidil overdosage resulting from topical administration of Regaine for Men Extra Strength.

Because of the concentration of minoxidil in Regaine for Men Extra Strength, accidental ingestion has the potential of producing systemic effects related to the pharmacological action of the drug (2 ml of Regaine for Men Extra Strength contains 100 mg minoxidil; the maximum recommended adult dose for oral minoxidil administration in the treatment of hypertension). Signs and symptoms of minoxidil overdosage would primarily be cardiovascular effects associated with sodium and water retention, and tachycardia. Fluid retention can be managed with appropriate diuretic therapy. Clinically significant tachycardia can be controlled by administration of a beta-adrenergic blocking agent.

The effect of Regaine for Men Extra Strength has been assessed in a phase III clinical trial conducted over a 48 week treatment period.

In this study Regaine for Men Extra Strength (5% minoxidil cutaneous solution) was compared to the product vehicle without the minoxidil active ingredient and also to 2% minoxidil cutaneous solution.

The primary efficacy criterion was non-vellus hair count in a 1.0cm² reference area of affected scalp. The mean changes observed in this parameter in these studies were significantly in favour of active treatment. A significant dose effect was also demonstrated. The results are summarized in the following table:

Mean change in non-vellus hair count in reference 1cm² area of scalp compared with baseline

Efficacy was further assessed by comparing photographs taken at various timepoints with baseline.

Assessment was undertaken by patients using a 100mm visual analogue scale and assessing scalp coverage where point 0 represented much less scalp coverage, 50mm no difference and 100mm much more scalp coverage. In addition, an assessment was undertaken by 2 blinded reviewers who compared photographs taken at baseline and after 48 weeks. Differences were assessed using a 7 point categorical scale viz:

Dense growth

Moderate growth

Minimal growth

No change

Minimal loss

Moderate loss

Dense loss

The results of these analyses were as follows:

Patient evaluation of change in scalp coverage

Photographic Evaluation of Clinical Response (Reviewer 1)

Photographic Evaluation of Clinical Response (Reviewer 2)

Based upon these photographic data, around 60% of the patients experienced an increased scalp coverage after 48 weeks treatment with Regaine for Men Extra Strength as defined by re-growth of hair; compared with around 23% at an average for those who received vehicle alone. Of these, around 35% treated with Regaine for Men Extra Strength experienced dense or moderate regrowth compared with around 7% who received vehicle alone. In addition 30% of patients who received Regaine for Men Extra Strength were adjudged to have no change between the photographic assessments of hair growth compared with 60% who received vehicle alone. Stabilisation of hair loss (expressed both as regrowth of hair and no continuation of hair loss) can therefore be expected in about 4 out of 5 of patients using Regaine for Men Extra Strength compared with 3 out of 4 patients using vehicle alone.

Regaine for Men Extra Strength may therefore be considered by men who wish to achieve a faster onset and greater degree of hair regrowth than would be expected through the use of Regaine Regular Strength.

The mechanism by which minoxidil stimulates hair growth is not fully understood, but minoxidil can reverse the hair loss process of androgenetic alopecia by the following means:

− increasing the diameter of the hair shaft

− stimulating anagen growth

− prolonging the anagen phase

− stimulating anagen recovery from the telegon phase

As a peripheral vasodilator minoxidil enhances microcirculation to hair follicles. The Vascular Endothelial Growth Factor (VEGF) is stimulated by minoxidil and VEGF is presumably responsible for the increased capillary fenestration, indicative of a high metabolic activity, observed during the anagen phase.

The failure to detect evidence of systemic effects during treatment with Regaine for Men Extra Strength reflects the poor absorption of topical minoxidil, which averages about 1.7% (range 0.3-4.5%) of the total applied dose from normal intact skin.

Absorption is about 2% when applied topically to shaved scalps of hypertensive users. Increasing the amount of drug applied or increasing the frequency of application of Regaine for Men Extra Strength also results in increased absorption.

The use of Regaine for Men Extra Strength in conjunction with occlusion (plastic dressings), application to sunburn areas, and increasing the surface area of application has minimal to no effect on the absorption of topical minoxidil.

Results of extensive pharmacokinetic studies indicate that the three major factors by which topical minoxidil absorption is increased are: increasing the dose applied, increasing the frequency of dosing and decreasing the barrier function of the stratum corneum.

Serum minoxidil levels and systemic effects resulting from administration of Regaine for Men Extra Strength are governed by the drug's absorption rate through the skin. Following cessation of topical dosing of Regaine for Men Extra Strength, approximately 95% of the systemically absorbed drug is eliminated within 4 days. Minoxidil and its metabolites are excreted principally in the urine.

Preclinical data reveal no special hazards for humans based on conventional studies of safety pharmacology, repeated dose toxicity, genotoxicity or carcinogenic potential.

Cardiac effects of minoxidil in dogs are species-specific in terms of the low doses that cause profound haemodynamic effects and associated changes in the heart. Available data indicate that similar cardiac effects do not occur in humans treated topically or orally with minoxidil.

In rat fertility studies, minoxidil at dose levels between 3 and 80 mg/kg exhibited adverse effects on fertility. Animal reproduction toxicity studies have shown a risk to the foetus at exposure levels that in comparison to levels obtained in humans are very high (doses that ranged from 569- to 1139-fold anticipated human exposures) and showed signs of maternal toxicity.

Propylene glycol

Ethanol

Water

None known.

36 months

Regaine for Men Extra Strength is flammable. Store below 25°C.

HDPE bottle with spray-pump/dabbing applicator containing 60 ml of solution. Packs contain either one or three bottles.

The solution is flammable and exposure of the container and contents to naked flames should be avoided during use, storage and disposal.

McNeil Products Limited

Foundation Park

Roxborough Way

Maidenhead

Berkshire SL6 3UG

United Kingdom

PL 15513/0148

28 June 2005

10 July 2009