A pill imprinted with 377 is a prescription pain medication containing 50 milligrams of Tramadol Hydrochloride. It is manufactured by Sun Pharmaceutical Industries Ltd. and is classified as a Schedule IV controlled substance in the United States.
Tramadol is a central-acting synthetic opioid analgesic prescribed for the management of moderate to severe acute or chronic pain in adults when non-opioid medications are inadequate.
Pill Identification & Physical Characteristics
To ensure safety and prevent medication errors or fake counterfeit pills, verify the visual properties of the physical tablet
- Imprint:
377debossed on one side. - Shape: Capsule-shaped / Oblong tablet.
- Color: Pure White.
- Score Line: Unscored (solid single piece, not intended to be split).
- Active Ingredient: 50 mg Tramadol Hydrochloride.
- Manufacturer: Sun Pharmaceutical Industries Ltd.
- Fentanyl Alert: Counterfeit pills resembling legitimate prescription opioids are widespread. Always obtain medications directly from a licensed, verified pharmacy.
Mechanism of Action
Tramadol possesses a dual mechanism of action, making it unique among prescription opioids:
- Opioid Receptor Agonism: Tramadol and its primary active metabolite, O-desmethyltramadol (M1), bind to mu-opioid receptors in the central nervous system (CNS). This alters the perception of and emotional response to pain.
- Monoamine Reuptake Inhibition: Tramadol acts as a serotonin and norepinephrine reuptake inhibitor (SNRI). By blocking the reabsorption of these neurotransmitters in the spinal cord, it enhances descending inhibitory pain pathways, preventing pain signals from reaching the brain.
Because of this dual mechanism, tramadol carries unique interaction risks such as serotonin syndrome and lowered seizure thresholds that classic opioids like morphine or oxycodone do not share to the same degree.
Recommended Dosage & Administration
Dosage is tailored to the individual’s pain severity, renal/hepatic function, and response.
- Standard Adult Immediate-Release Dosage (50 mg tablet):
- Initial/Maintenance Dose: 50 mg to 100 mg orally every 4 to 6 hours as needed for pain.
- Maximum Daily Dose: Do not exceed 400 mg per day (8 tablets of 50 mg).
Special Dosage Considerations:
- Elderly (over 75 years): Total daily dosage should generally not exceed 300 mg per day, given at longer dosing intervals due to decreased drug clearance.
- Kidney/Liver Impairment: Patients with reduced renal or hepatic clearance require reduced doses or longer intervals (e.g., 50 mg every 12 hours).
- Administration: Swallow tablets whole with water. They can be taken with or without food. Never crush, split, or dissolve immediate-release or extended-release formulations.
Side Effects
Common Side Effects
Most common reactions occur as the body adjusts to the central nervous system effects:
- Gastrointestinal: Nausea, vomiting, dry mouth, indigestion, and constipation.
- Central Nervous System: Dizziness, somnolence (drowsiness), headache, fatigue, or lightheadedness.
- Dermatologic: Sweating, flushing, or localized itching (pruritus).
Serious & Severe Side Effects
Contact emergency services immediately if you experience:
- Serotonin Syndrome: Agitation, fever, rapid heart rate, muscle rigidity, twitching, shivering, sweating, and confusion (high risk when combined with antidepressants).
- Seizures (Convulsions): Can occur even at recommended therapeutic doses, particularly in those with a history of epilepsy.
- Severe Respiratory Depression: Dangerously slow, shallow, or irregular breathing.
- Adrenal Insufficiency: Long-term use can reduce cortisol levels, resulting in extreme fatigue, weakness, dizziness, and low blood pressure.
- Severe Hypoglycemia: Unexpected drop in blood sugar levels, leading to confusion, shakiness, or loss of consciousness.
Black Box Warnings & Crucial Safety Risks
The FDA mandates prominent Boxed Warnings for Tramadol:
- Addiction, Misuse, and Abuse: Tramadol carries a risk of central nervous system habituation, dependence, addiction, overdose, and death.
- Life-Threatening Respiratory Depression: Can cause fatal slowing or stopping of breathing. Risk is heightened when initiating therapy or increasing doses.
- Contraindicated in Children: Tramadol is strictly contraindicated in all children under 12 years of age, and in children under 18 following surgery to remove tonsils or adenoids due to the risk of fatal respiratory events.
- Neonatal Opioid Withdrawal Syndrome (NOWS): Prolonged use during pregnancy can lead to life-threatening withdrawal symptoms in the newborn.
- Concomitant Central Nervous System Depressant Use: Combining tramadol with alcohol, benzodiazepines (e.g., Xanax, Valium), or other sedatives can cause profound sedation, coma, and fatal respiratory collapse.
- Ultra-Rapid Metabolism (CYP2D6 Polymorphism): Individuals who convert tramadol to its active M1 metabolite ultra-rapidly are at risk for life-threatening respiratory depression even at standard prescribed doses.
Precautions & Important Drug Interactions
- Antidepressants & SSRIs/SNRIs: Taking tramadol alongside SSRIs, SNRIs, TCAs, or MAO inhibitors significantly increases the risk of serotonin syndrome and seizures. Do not take tramadol within 14 days of taking an MAO inhibitor.
- Alcohol Avoidance: Do not consume alcohol while taking tramadol; it dangerously amplifies central nervous system depression and liver toxicity risks.
- Physical Dependence & Tapering: Discontinuing tramadol abruptly after prolonged use causes withdrawal symptoms (restlessness, severe anxiety, sweating, insomnia, body aches, runny nose). Dose reduction should always be gradually tapered under medical supervision.
- Operating Machinery: Avoid driving or operating heavy machinery until you know how tramadol affects your alertness and motor skills.