Side effect(s) of Pentazocine

Read the side effects of Pentazocine as described in the medical literature. In case of any doubt consult your doctor or pharmacist.
Heart- Circulatory depression, high blood pressure, shock, fast heart rate.

Central Nervous System- Confusion, depression, disorientation, disturbed dreams, dizziness, excitement, faintness, hallucinations, headache, sleeplessness, irritability, light-headedness, muscle tremor, tingling, sedation, temporary loss of consciousness, tremor, weakness.

Skin- Inflammation, including itching, excessive sweating, flushed skin.

Eye and ENT- Double vision, constriction of the pupil, involuntary eye movement, perception of sound, visual blurring, and focusing difficultly.

Gastrointestinal- Constipation, cramps, diarrhea, dry mouth, nausea, taste alteration, vomiting.

Blood- High concentration of eosinophils decrease in the number of granulocytes.

Skin- Subcutaneous depression, nodules, severe stiffness, soft tissue induration, sting on injection, and ulceration at injection sites.

Respiratory- Difficulty in breath, respiratory depression, transient sleep disorder in newborns whose mothers received parenteral pentazocine during labor.

Miscellaneous- Allergic reactions, alterations in rate or strength of uterine contractions during labor, chills, urinary retention, unusual weakness.

Other Precautions : *Change the injection sites, avoid abrupt withdrawal.
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