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Brief stinging at the application site is a common side effect of topical benzalkonium chloride, which also has the uncommon, but potentially severe, side effects of rash, hives, itching, difficulty breathing, tightness ... More »

The common side effect of benzalkonium chloride is minor irritation at the application site, while severe side effects include redness, pain, swelling and severe allergic reactions, according to Drugs.com. Severe side ef... More »

Possible side effects of potassium chloride include diarrhea, vomiting, gas and nausea, according to WebMD. Some people may experience an upset stomach after taking potassium chloride. It is important to notify a physici... More »

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Severe side effects of Traumeel ointment include allergic reactions such as rash, hives, itching, tightness in the chest, difficulty breathing and swelling in the mouth, face, lips or tongue, according to Drugs.com. Side... More »

The common side effect of benzalkonium chloride is minor irritation at the application site, while severe side effects include redness, pain, swelling and severe allergic reactions, according to Drugs.com. Severe side ef... More »

Some side effects of progesterone suppositories (or progesterone vaginal) include allergic reactions, as evidenced by hives; difficulty breathing and swelling in the face, throat or mouth; headache; numbness, especially ... More »

Potential side effects of using a ProAir inhaler result from the active ingredient albuterol and include shaking, pounding heartbeat, cough, difficulty breathing and difficulty swallowing, according to Drugs.com. Other p... More »