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Your symptoms may take 1-2 weeks to improve. However, in some cases, it may take even longer. Consult your doctor if your condition doesn't improve or if you have any doubts regarding your condition.

No, ZEN Retard 200 Tablet ER is not an analgesic and should not be used for regular aches or pains. It is an anti-epileptic medicine which is used to treat fits (seizures). It is also used in the treatment of trigeminal neuralgia (intense facial nerve pain). In addition to that, ZEN Retard 200 Tablet ER is used to control mood disorders when other medicines fail to work.

Inform your doctor if you are taking any other medicines including medicines for epilepsy or seizures, medicines used to thin your blood (e.g., warfarin), medicines to control bacterial infection (e.g., chloramphenicol, metronidazole and doxycycline) and medicines to control viral infection (e.g., nelfinavir). Also, let your doctor know if you take asthma medicines (e.g., theophylline and montelukast), birth control pills, etc. It is important to tell your doctor if you are planning to become pregnant or are breastfeeding. Further, you should tell the doctor if you have ever had liver problems, kidney problems, lung problems or porphyria (a rare blood pigment disorder).

The long-term side effects of ZEN Retard 200 Tablet ER vary from person to person. While some people can take ZEN Retard 200 Tablet ER safely for several years, some may develop side effects on using it for long term. These side effects include osteoporosis and osteopenia in which the bones become weak and can get easily fractured. Therefore, if you have been prescribed ZEN Retard 200 Tablet ER for a long term, get your bone density checked at regular intervals, maintain a healthy diet and exercise daily.

ZEN Retard 200 Tablet ER may make you sleepy or you may feel dizzy. Therefore, avoid driving or operating heavy machinery. Alcohol consumption should be avoided since taking both together may cause excessive sleepiness.

You should stop ZEN Retard 200 Tablet ER only after consulting your doctor. It is advised to gradually decrease the dose of ZEN Retard 200 Tablet ER so that the condition for which you are taking it does not recur.

Pay attention to any changes, especially sudden changes in mood, behavior, thoughts or feelings. Keep all follow-up visits with your doctor as scheduled. Call your doctor as needed, especially if you are worried about any symptoms.

Yes, ZEN Retard 200 Tablet ER causes weight gain as a common side effect. This could be due to an increase in appetite. You can manage your weight by eating a healthy diet, consuming low calorie food and including more vegetables and fruits in your diet. Also, regular physical exercise will be very helpful.

Though rare but ZEN Retard 200 Tablet ER may cause decreased sexual desire. It may also impair male fertility as it may reduce sperm count and/or motility. Consult your doctor if you develop these symptoms.

Once the medicine relieves your pain, talk to your doctor who will gradually reduce your dose. ZEN Retard 200 Tablet ER can be possibly stopped if there is no recurrence of pain after taking the reduced dose for several weeks.

Side effects of ZEN Retard 200 Tablet ER can be reduced by starting it at a low dose. The doctor may gradually increase the dose, until an effective dose is reached.

Before starting treatment with ZEN Retard 200 Tablet ER, your doctor may ask you to get regular blood tests, liver function test, and in some cases, even a urine test. You may need to take these tests from time to time during your treatment. This is quite usual and nothing to worry about.