Side effects that you may encounter after you order Detrol online include dry mouth, dry eyes, headache, constipation, nausea, dizziness or drowsiness may occur. If these effects persist or become worse, let your doctor know promptly. To relieve dry mouth, suck on (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water or use saliva substitute. Report promptly: symptoms of urinary infection (e.g., urinary burning, urgent and frequent urination). Unlikely but report promptly: vision problems, eye pain, difficulty with urination, severe stomach pain, chest pain, fast heartbeat, hot/dry skin, mental or mood changes. If you notice other effects not listed above, contact your local doctor.