Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur, especially if several of them occur together:

Rare

Bleeding or crusting sores on lips; chest pain; fever with or without chills; hive-like swellings (large) on eyelids, face, lips, and/or tongue; muscle cramps or pain; red, thickened, or scaly skin; shortness of breath, troubled breathing, tightness in chest, or wheezing; skin rash, itching, or hives; sores, ulcers, or white spots in mouth (painful); sore throat

Symptoms of overdose

Anxiety, confusion, excitement, irritability, nervousness, restlessness, or trouble in sleeping (severe, especially with products containing caffeine); convulsions (seizures) (for products containing caffeine); diarrhea, especially if occurring together with increased sweating, loss of appetite, and stomach cramps or pain; dizziness, lightheadedness, drowsiness, or weakness, (severe); frequent urination (for products containing caffeine); hallucinations (seeing, hearing, or feeling things that are not there); increased sensitivity to touch or pain (for products containing caffeine); muscle trembling or twitching (for products containing caffeine); nausea or vomiting, sometimes with blood; ringing or other sounds in ears (for products containing caffeine); seeing flashes of ``zig-zag'" lights (for products containing caffeine); shortness of breath or unusually slow or troubled breathing; slow, fast, or irregular heartbeat; slurred speech; staggering; swelling, pain, or tenderness in the upper abdomen or stomach area; unusual movements of the eyes

Also, check with your doctor as soon as possible if any of the following side effects occur:

Less common

Confusion (mild); mental depression; unusual excitement (mild)

Rare

Bloody or black, tarry stools; bloody urine; pinpoint red spots on skin; swollen or painful glands; unusual bleeding or bruising; unusual tiredness or weakness (mild)

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Bloated or ``gassy'" feeling; dizziness or lightheadedness (mild); drowsiness (mild); nausea, vomiting, or stomach pain (occurring without other symptoms of overdose)

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.