Category: Antihistamines and Allergy Medication. Antihistamines are a type of medication that is commonly used to treat allergies and other conditions that cause symptoms such as sneezing, itching, runny nose, watery eyes, and hives. These medications work by blocking the action of histamine, which is a chemical released in response to an allergen. Antihistamines can be taken orally, applied topically, or given through injection. There are many different types of antihistamines available on the market, each with its own unique properties and benefits. Some antihistamines are long-lasting and provide relief for up to 24 hours, while others are short-acting and need to be taken more frequently. Some antihistamines are non-drowsy and do not cause drowsiness or impaired cognitive function, while others can make you feel sleepy. When it comes to choosing an antihistamine for your allergy symptoms, there are a few things to consider. First, think about the severity of your symptoms and how long they last. If your symptoms are mild and short-lived, a shorter-acting antihistamine may be sufficient. However, if your symptoms are severe and persistent, you may want to choose an antihistine that provides longer-lasting relief. Second, consider whether you prefer to take the medication orally or apply it topically. Some people find oral medications easier to swallow, while others prefer to apply them directly to the affected area. Finally, think about any potential side effects or interactions with other medications. Some antihistamines can cause drowsiness, dry mouth, and constipation, so it's important to choose one that is safe for you to take. Additionally, some antihistamines may interact with other medications, such as blood thinners or sedatives, so be sure to check with your doctor before taking any new medication. Overall, antihistamines and allergy medication can be an effective way to manage symptoms associated with allergies and other conditions.