Hey as Tramadol hydrochloride is one of a group of medicines called centrally acting analgesics and are used for the relief of moderate or severe pain.

Side effects
Convulsions (seizures)
Darkened urine
Difficult urination
Dizziness or lightheadedness when getting up from a lying or sitting position
Fainting
Fast heartbeat
Frequent urge to urinate
Gaseous abdominal or stomach pain
Heart rate increased
Indigestion
Irregular heartbeat
Loss of memory
Abdominal or stomach fullness
Abnormal or decreased touch sensation
Blisters under the skin
Bloating
Blood in the urine
Blood pressure increased
Blurred vision
Change in walking and balance
Chest pain or discomfort
Chills

Doses:
Adults and children aged 12 years and over
Acute pain (such as after an operation):
One to two capsules three to four times a day. To be taken for as long as prescribed by your doctor.


Chronic pain (such as that associated with cancer):
one or two capsules at first, then one to two capsules every 4 to 6 hours
according to the severity of your pain.

Take no more than eight capsules (400mg) in any 24 hour period unless told
to by your doctor.

Elderly:

One to two capsules every 9 hours.

Patients with liver or kidney impairment: One to two capsules every 12
hours.

Children: Not recommended for use in children aged under 12 years.