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If your allergy symptoms are relatively severe or over-the-counter eye drops are ineffective at providing relief, you may need your eye doctor to prescribe a stronger medication. Prescription eye drops and oral medications used to relieve eye allergies include: 1  Antihistamines.f your allergy symptoms are relatively severe or over-the-counter eye drops are ineffective at providing relief, you may need your eye doctor to prescribe a stronger medication. Prescription eye drops and oral medications used to relieve eye allergies include: 1  Antihistamines.
How Allergies Work. Extreme allergic reactions may include difficulty breathing and anaphylactic shock. The exposure-reaction time can vary depending on your body (how well you handle the exposure) and the allergen you were exposed to. In a mild case, you may only have mild itching or swelling.