Which of the following is a potential side effect of Arnica montana when used topically?

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Multiple Choice

Which of the following is a potential side effect of Arnica montana when used topically?

Topical Arnica montana can cause adverse reactions, with skin irritation being the most common_local effect_ due to irritation from the plant's constituents, especially on broken or sensitive skin. However, a smaller amount can be absorbed through the skin, and in some people this systemic absorption may reach the central nervous system and trigger symptoms such as a headache. This is why headache is listed as a potential side effect: it reflects the possibility of systemic effects from topical use, albeit less commonly than a local skin reaction. To minimize risk, apply only to intact skin, avoid broken areas and mucous membranes, and discontinue if irritation or systemic symptoms occur.

Topical Arnica montana can cause adverse reactions, with skin irritation being the most common_local effect_ due to irritation from the plant's constituents, especially on broken or sensitive skin. However, a smaller amount can be absorbed through the skin, and in some people this systemic absorption may reach the central nervous system and trigger symptoms such as a headache. This is why headache is listed as a potential side effect: it reflects the possibility of systemic effects from topical use, albeit less commonly than a local skin reaction. To minimize risk, apply only to intact skin, avoid broken areas and mucous membranes, and discontinue if irritation or systemic symptoms occur.

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