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Venlafaxine

Last updated on July 26, 2019.

Overview   |   Dosage   |   Side Effects   |   Where To Buy  

GENERIC NAME: Venlafaxine

CHINESE NAME: 文拉法辛

COMMON BRANDS IN HONG KONG: Deprevix prolonged-release, Efexor/ Efexor XR 怡諾思, Venlor XR, Venxor

What is Venlafaxine for?

Venlafaxine belongs to a class of medications called selective serotonin and norepinephrine reuptake inhibitors (SNRIs). SNRIs are antidepressants which work by allowing some chemicals, mainly serotonin and norepinephrine, but also dopamine to stay longer in the brain in order to boost mood. It is usually used to treat depression, generalized anxiety disorder, social anxiety disorder and menopausal symptoms, particularly hot flushes. The active metabolite of Venlafaxine is Desvenlafaxine.

How to use it?

In Hong Kong, Venlafaxine is available in conventional (Venxor) and extended-release tablets (Efexor XR and other prolonged-release products). When you are taking an extended-release tablet/capsule, swallow the whole tablet/capsule but do not crush, chew or cut. Do not stop Venlafaxine abruptly without professional advice. Avoid drinking alcohol while taking Venlafaxine.

The dosages for different uses are listed as follows:

For major depression

Adult

Conventional tablet: Usually start with 37.5-75 mg two to three times daily. Usual maintenance doses are 75-375 mg daily.

Extended-release products: Usually start with 37.5-75 mg once daily. Usual maintenance doses are 75-225 mg once daily.

For generalized anxiety disorder

Adult

Extended-release products: Usually start with 37.5-75 mg once daily. Usual maintenance doses are 75-225 mg once daily.

For social anxiety disorder

Adult

Usually start with 37.5 mg once daily. Doses usually increase to 75 mg afterwards after 1-2 weeks.

For menopausal symptoms

Adult

Usually start with 37.5 mg once daily. Doses usually increase to 75 mg after 1 week.

What are the side effects of Venlafaxine?

Venlafaxine can cause side effects including anxiety, insomnia, diarrhoea, headache, sexual dysfunction, and nausea.

Where to buy Venlafaxine in Hong Kong?

In Hong Kong, Venlafaxine is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at http://www.drugoffice.gov.hk

For detailed information about the use of Venlafaxine in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

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