Myrica Capsule | 100mg

Myrica 100 is a medicine used to relieve pain caused by nerve damage (neuropathic pain) due to diabetes, shingles (herpes zoster infection), spinal cord injury, or other conditions. It is also used to treat widespread muscle pain and stiffness in people with fibromyalgia. Myrica 100 belongs to the anti-epileptic group of medicines and can be used to treat certain types of seizures (fits) in combination with other medicines. It may also be prescribed to treat the symptoms of excessive anxiety in generalized anxiety disorder if other medicines are not suitable. You can take Myrica 100 with or without food, but it is important to take this medicine at the same time each day to get the most benefit. The exact dose and duration of treatment will depend on your condition and how you respond to it. Your doctor will probably start this medicine at a low dose and increase it gradually. It may take a few weeks for the medicine to work properly. Follow your doctor's instructions and continue taking it regularly until your doctor advises you to stop. Do not miss any dose, otherwise, your condition may worsen. The side effects of this medicine are usually mild and go away by themselves. The most common ones are feeling sleepy or dizzy, dryness in the mouth, blurred vision, weight gain, edema (swelling over the whole body), and difficulty in concentrating. Most side effects are not serious and do not need medical attention. Talk to your doctor about potential side effects and ways in which you might prevent or cope with them. Before taking the medicine you should tell your doctor if you are pregnant, breastfeeding or planning to become pregnant. Be careful while driving as sleepiness, dizziness, and blurring of vision may be seen as side effects. You should avoid drinking alcohol along with this medicine as it may lead to excessive sleepiness and dizziness.

Pharmacology

Pregabalin is a structural derivative of the inhibitory neurotransmitter gamma-aminobutyric acid (GABA). It does not bind directly to GABAA, GABAB or benzodiazepine receptors. Pregabalin binds with high affinity to the alpha2-delta site (an auxiliary subunit of voltage-gated calcium channels) in central nervous system tissues. Although the mechanism of action of Pregabalin has not been fully elucidated, results in animal studies suggest that binding to the alpha2-delta subunit may be involved in Pregabalin's anti-nociceptive and antiseizure effects.

Dosage

Neuropathic pain associated with diabetic peripheral neuropathy in adults (DPN): The maximum recommended dose of Pregabalin is 100 mg three times a day (300 mg/day) in patients with creatinine clearance of at least 60 ml/min. Dosing should begin at 50 mg three times a day (150 mg/day). The dose may be increased to 300 mg/day within 1 week based on efficacy and tolerability. Begin dosing of Pregabalin CR capsule at 165 mg once daily and increase to 330 mg once daily within 1 week based on individual patient response and tolerability. The maximum recommended dose of Pregabalin CR capsule is 330 mg once daily.

Postherpetic neuralgia in adults (PHN): The recommended dose of Pregabalin is 75 to 150 mg two times a day or 50 to 100 mg three times a day (150 to 300 mg/day) in patients with creatinine clearance of at least 60 ml/min. Dosing should begin at 75 mg two times a day or 50 mg three times a day (150 mg/day). The dose may be increased to 300 mg/day within 1 week based on efficacy and tolerability. Patients who do not experience sufficient pain relief following 2 to 4 weeks of treatment with 300 mg/day and who are able to tolerate Pregabalin, may be treated with up to 300 mg two times a day or 200 mg three times a day (600 mg/day).

Begin dosing of Pregabalin CR capsule at 165 mg once daily and increase to 330 mg once daily within 1 week based on individual patient response and tolerability. Patients who do not experience sufficient pain relief following 2 to 4 weeks of treatment with 330 mg once daily and who are able to tolerate Pregabalin CR capsule, may be treated with up to 660 mg once daily. In view of the dose-dependent adverse reactions and the higher rate of treatment discontinuation due to adverse reactions, dosing above 330 mg/day should be reserved only for those patients who have on-going pain and are tolerating 330 mg daily. The maximum recommended dose of Pregabalin CR capsule is 660 mg once daily.

Management of fibromyalgia in adults: The recommended dose of Pregabalin is 300 to 450 mg/day. Dosing should begin at 75 mg two times a day (150 mg/day). The dose may be increased to 150 mg two times a day (300 mg/day) within 1 week based on efficacy and tolerability. Patients who do not experience sufficient benefit with 300 mg/day may be further increased to 225 mg two times a day (450 mg/day).

Neuropathic pain associated with spinal cord injury in adults: The recommended dose range of Pregabalin is 150 to 600 mg/day. The recommended starting dose is 75 mg two times a day (150 mg/day). The dose may be increased to 150 mg two times a day (300 mg/day) within 1 week based on efficacy and tolerability. Patients who do not experience sufficient pain relief after 2 to 3 weeks of treatment with 150 mg two times a day and who tolerate Pregabalin may be treated with up to 300 mg two times a day.

Conversion from Pregabalin capsules to Pregabalin CR capsule tablet: When switching from Pregabalin capsules to Pregabalin CR capsule tablet on the day of the switch, instruct patients to take their morning dose of Pregabalin capsule as prescribed and initiate Pregabalin CR capsule therapy after an evening meal.

Pregabalin tablet total daily dose (dosed 2 or 3 times daily): Pregabalin CR capsule capsule dose (dosed once a day)
 

• 75 mg/daily: 82.5 mg/day
• 150 mg/daily: 165 mg/day
• 225 mg/daily: 247.5 mg/day
• 300 mg/daily: 330 mg/day
• 450 mg/daily: 495 mg/day
• 600 mg/daily: 660 mg/day

Administration

Route of administration: Pregabalin is taken in oral route. It can be taken with or without food. Pregabalin CR tablet should be administered after an evening meal. It should be swallowed whole and should not be split, crushed or chewed. If patients miss taking their dose of Pregabalin CR after an evening meal, then they should take their usual dose of Pregabalin CR prior to bedtime following a snack. If they miss taking the dose of Pregabalin CR prior to bedtime, then they should take their usual dose of Pregabalin CR following a morning meal. If they miss taking the dose of Pregabalin CR following the morning meal, then they should take their usual dose of Pregabalin CR at the usual time that evening following an evening meal. When discontinuing both Pregabalin and Pregabalin CR, it should be gradually tapered over a minimum of 1 week.