Hyperhidrosis (excessive sweating) is a disorder that describes a person who sweats more than the body would normally need to maintain optimal temperature. About 3% of our population is being affected and about 1/3 of this group have a severe form of this disorder. Studies indicate that hyperhidrosis greatly impacts the quality of life similar to or even worse than severe acne or psoriasis.
There are 2 types of hyperhidrosis:
Primary hyperhidrosis which has an unknown cause. It affects localized areas such as underarms, hands, feet, and face. 
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Secondary hyperhidrosis is caused by other underlying medical condition or medication. 
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Topical antiperspirants are usually the typical treatment options. Topical products containing aluminum salts (e.g. Drysol) obstruct sweat ducts and prevent sweating. Potential side effects including skin irritation can occur. It is suggested to ensure affected areas is completely dry before application. Apply at bedtime and wash off in the morning. The topical aluminum-containing product also comes in gel form.
Glycopyrrolate topical application is another treatment option that has also been proven clinically. It can penetrate the skin to block the nerve signals that stimulate the sweat glands and therefore resulting in a reduction of sweat secretion. Clinical studies show good tolerance with minimal side effects. Potential side effects with most commonly happen are dry mouth. It is suggested to apply at bedtime.
References:
www.dermatology.ca
www.sweatless.ca