Before using Celexa:

Some medical conditions may interact with Celexa. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
if you are pregnant, planning to become pregnant, or are breast-feeding
if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
if you have allergies to medicines, foods, or other substances
if you or a family member has a history of bipolar disorder (manic depression), other mental or mood problems, suicidal thoughts or attempts, or alcohol or substance abuse
if you have a history of seizures, liver problems, kidney problems, heart problems (eg, heart failure, slow or irregular heartbeat), high blood pressure, stroke, bleeding problems, stomach or bowel bleeding, or metabolism problems
if you have a condition or take medicine that may increase your risk of low potassium or magnesium levels. Check with your doctor if you are not sure if any of your conditions or medicines may increase this risk
if you are dehydrated, have low blood volume or low blood sodium levels, or drink alcohol
if you will be having electroconvulsive therapy (ECT)
if you take any medicine that may increase the risk of a certain type of irregular heartbeat (prolonged QT interval). Check with your doctor or pharmacist if you are unsure if any of your medicines may increase the risk of this type of irregular heartbeat
if you are taking a medicine that contains methylene blue

Some MEDICINES MAY INTERACT with Celexa. Tell your health care provider if you are taking any other medicines, especially any of the following:
Fenfluramine derivatives (eg, dexfenfluramine), fentanyl, linezolid, lithium, MAOIs (eg, phenelzine, selegiline), meperidine, metoclopramide, nefazodone, serotonin 5-HT1 receptor agonists (eg, sumatriptan), sibutramine, SNRIs (eg, duloxetine, venlafaxine), other SSRIs (eg, fluoxetine, paroxetine), St. John's wort, trazodone, or tryptophan because severe side effects, such as a reaction that may include fever, rigid muscles, blood pressure changes, mental changes, confusion, irritability, agitation, delirium, and coma, may occur
Anticoagulants (eg, warfarin), aspirin, or nonsteroidal anti-inflammatory drugs (NSAIDs) (eg, ibuprofen) because the risk of bleeding, including stomach bleeding, may be increased
Diuretics (eg, furosemide, hydrochlorothiazide) because the risk of low blood sodium levels may be increased
Tramadol because the risk of seizures may be increased
Antiarrhythmics (eg, quinidine, procainamide, amiodarone, sotalol), arsenic, certain antibiotics (eg, gatifloxacin, moxifloxacin), cimetidine, halofantrine, levomethadyl, methadone, nilotinib, omeprazole, ondansetron, pentamidine, phenothiazines (eg, chlorpromazine, thioridazine), pimozide, or vandetanib because the risk of irregular heartbeat may be increased
Carbamazepine or cyproheptadine because they may decrease Celexa's effectiveness
Aripiprazole, beta-blockers (eg, propranolol), clozapine, risperidone, or tricyclic antidepressants (eg, amitriptyline) because the risk of their side effects may be increased by Celexa

This may not be a complete list of all interactions that may occur. Ask your health care provider if Celexa may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.
I have been taking Celexa for only three weeks but I've already noticed a difference in my mood. I feel a bit more relaxed and the panic attacks are null if any. I started with 10mg for 4 days then up to 20mg which proved to be way too much for me so I backed down to 10mg and have felt great since. Side effects: some slight yawning here and there but not a big deal. I recommend this medicine for those with mild anxiety/depression.
 I like Celexa so much better than Zoloft. With Zoloft I had trouble sleeping, nausea and it did not help my anxiety and depression symptoms. I have had a great experience with Celexa. So much so that I am uncertain if I would ever want to be taken off of it.