Alphagan P


Alphagan P Side Effects

Eye discomfort/itching/redness, blurred vision, dizziness, dry mouth, bad taste in the mouth, drowsiness, or tiredness may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if any of these unlikely but serious side effects occur: fast/pounding heartbeats, persistent headache, eye pain/burning/swelling, extreme sensitivity to light, vision changes.

Tell your doctor right away if any of these rare but very serious side effects occur: fainting, slow/irregular heartbeats.

A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
  • depression
  • iritis
  • photophobia
  • ocular discomfort
  • blurred vision
  • visual changes
  • corneal staining
  • corneal erosion
  • follicular conjunctivitis
  • mucopurulent conjunctivitis
  • allergic conjunctivitis
  • conjunctival hyperemia
  • conjunctival hemorrhage
  • chemosis
  • conjunctival blanching
  • blepharitis
  • eyelid edema
  • dry eye
  • eye tearing
  • ocular pain
  • ocular redness
  • ocular irritation
  • eyelid crusting
  • ocular itching
  • hypertension
  • bradycardia
  • rhinitis
  • nasal congestion
  • xerostomia
  • gastrointestinal irritation
  • muscle weakness
  • myalgia
  • drowsy
  • syncope
  • dizziness
  • insomnia
  • fatigue
  • dysgeusia
  • headache disorder
  • sneezing
  • palpitations
  • nausea
  • vomiting
  • symptoms of anxiety

Drug Interactions

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug include: beta-blockers (e.g., atenolol, metoprolol, timolol eye drops), digoxin, high blood pressure medications (e.g., clonidine, terazosin), tricyclic antidepressants (e.g., amitriptyline).

Tell your doctor or pharmacist if you are using other products that cause drowsiness such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana (cannabis), drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), or antihistamines (such as cetirizine, diphenhydramine).

Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.