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Thaden Capsules and Tablets
[Dosulepin hydrochloride]
Read all of this leaflet carefully before you start taking this medicine because it contains important
information for you.
 Keep this leaflet. You may need to read it again.
 If you have any further questions, ask your doctor or pharmacist.
 This medicine has been prescribed for you only. Do not pass it on to others. It may harm them,
even if their signs of illness are the same as yours.
 If you get any side effects, talk to your doctor or pharmacist. This includes any possible side
effects not listed in this leaflet.
What is in this leaflet:
1. What Thaden is what it is used for
2. What you need to know before you take Thaden Capsules and Tablets
3. How to take Thaden Capsules and Tablets
4. Possible side effects
5. How to store Thaden Capsules and Tablets
6. Contents of the pack and other information
1. What Thaden is and what it is used for
Thaden contains the active ingredient, Dosulepin hydrochloride which belongs to a group of medicines
called antidepressants.
Thaden Capsules and Tablets are used to treat depression and can also help reduce feelings of anxiety.
Your doctor has prescribed dosulepin as other medicines are unsuitable for you. Please ask your doctor or
pharmacist if you need more information.
2. What you need to know before you take Thaden Capsules and Tablets
Do not take Thaden Capsules and Tablets if:
 You know that you are allergic (hypersensitive) to dosulepin or any other ingredients (listed
in section 6 of this leaflet)
 You have an irregular heart beat or any other heart problems
 You have liver problems
 You have an eye condition known as glaucoma
 You are a man that has prostate problems (difficulty in passing water or enlarged prostate)
 You have been diagnosed as having mania (feeling over-excited with unusual behavior)
 You have fits (epilepsy)
Not for use in children
Thoughts of suicide and worsening of your depression or anxiety disorder
If you are depressed and/or have anxiety disorders you can sometimes have thoughts of harming or killing
yourself. These may be increased when first starting antidepressants, since these medicines all take time
to work, usually about two weeks but sometimes longer.

You may be more likely to think like this:
 If you have previously had thoughts about killing or harming yourself
 If you are a young adult
Information from clinical trials has shown an increased risk of suicidal behavior in adults aged less than
25 years with psychiatric conditions who were treated with an antidepressant.
If you have thoughts of harming or killing yourself at any time, contact your doctor or go to a hospital
straight away.
You may find it helpful to tell a relative or close friend that you are depressed or have an anxiety disorder,
and ask them to read this leaflet. You might ask them to tell you if they think your depression or anxiety
is getting worse, or if they are worried about changes in your behavior.
Warnings and precautions
Talk to your doctor or pharmacist before taking Dosulepin Capsules or Tablets if:
 You are going to the dentist or going to have surgery, tell your surgeon you are taking Thaden
Capsules and Tablets. It may affect the anaesthetic used
 You are diabetic, as your blood sugar levels may change whilst taking Thaden
 You are receiving electro-shock therapy (ECT) (used in severe depression)
 You have a thyroid (gland in your neck) problem, difficulty in passing urine , or a tumor of the
adrenal gland (a gland above the kidney)
 You suffer from porphyria (a disease causing damage to the nerves and skin sensitivity)
 You have a history of mania or psychoses
 You have cardiac disease
 You have severe renal disease
 You have a history of epilepsy
 You suffer from hyperthyroidism
Other medicines and Thaden Capsules and Tablets
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, in
particular any of the following:
 A medicine used to treat depression called a mono-amine oxidase inhibitor (MAOI). You
should not take Thaden Capsules and Tablets at the same time as MOAIs or within 14 days of
stopping them e.g selegiline, rasagiline
 Other medicines used to treat depression called SSRIs (selective-serotonin reuptake
 Any medicines given to you for treating high blood pressure (hypertension) e.g betanidine,
debrisoquine, guanethidine, clonidine
 Medicines used in heart conduction disorders e.g. quinidine, amiodarone, felcainide,
procainamide, propafenone or disopyramide
 Any hayfever/allergy medicines which contains terfenadine or astemizole
 Sotalol, quinidine, cisapride, pentamidine, isetionate, clonidine (medicines for heart or blood
pressure problems)
 Halofantrine (a medicine for malaria)
 Rifampicin (an antibacterial)

Any medicines called barbiturates (e.g. amylobarbital for sleeplessness) or methylphenidate
(used to treat behavioral problems)
Any medicine that contains opioid/narcotic analgesics (these include codeine, morphine, coproxamol and co-dydramol)
Tramadol, a strong pain killer
Medicines called sympathomimetic agents – these include ephedrine, pseudoephedrine,
adrenaline and noradrenaline (these may be found in medicines used to treat heart problems
and asthma as well as some decongestants and cough/cold remedies)
Medicines called antimuscarinics (medicines for Parkinson’s Disease, stomach and bladder
Pimozide and sertindole (medicines for serious mental problems)
Cimetidine (used to treat stomach ulcers)
Diuretic medicines (“water tablets”)
Calcium channel blockers (medicines for heart problems e.g. amlodipine , diltiazem,
nifedipine, verapamil)
Medicines for epilepsy or fits e.g phenytoin , primidone, carbamazepine
Oestrogen-containing contraceptives (these may decrease the anti depressant effect of
Local anaesthetics
Quinolone antibiotics e.g. moxifloxacin
Atomoxetine used to treat Attention-Deficit/Hyperactivity Disorder (ADHD)
Warfarin, coumarin or other anticoagulants, as there could be changes in bleeding times
Ritonavir used in treatment of HIV

Thaden Capsules and Tablets with food, drink and alcohol
Thaden can make you feel drowsy. If you drink alcohol with these capsules or tablets, this can make you
feel more drowsy.
The capsules and tablets should be swallowed whole with a drink of water. Do not chew them
Pregnancy and breast-feeding
If you are or think you might be pregnant or you plan to become pregnant, or if you are breast-feeding
you must tell your doctor before you take this medicine . Your doctor will decide if you can take these
capsules or tablets.
Driving and using machines
Thaden can make you feel drowsy. Do not drive, operate machinery or do anything that requires you to be
alert until you know how the capsules or tablets will affect you. Feeling drowsy in the day may lessen as
treatment continues, but if drowsiness becomes a problem, you should tell your doctor.
Thaden Tablets contain lactose and sunset yellow (E110)
Thaden Capsules contain lactose and ponceau 4R (E124)
If you have been told by your doctor that you have intolerance to some sugars, contact your doctor before
taking this medicine. Sunset yellow (E110) and Ponceau 4R (E124) can cause allergic reactions.
3. How to take Thaden Capsules and Tablets
Your doctor will tell you how many capsules or tablets to take and when you should take them. This will
also be on the carton label. Ask your pharmacist or doctor for help if you are not sure how to take your
capsules or tablets or if you want more information.

The capsules and tablets should be swallowed whole with a drink or water. Do not chew them
The usual dose is:
Adults: One 25mg capsule three times a day or one 75mg Tablet at night. In some cases the doctor may
increase your dose, if he considers this necessary. Normally not more than 9 capsules or 3 tablets should
be taken each day.
Elderly: The usual starting dose is between 1 and 3 capsules or tablets a day.
It may take two to four weeks of treatment before you begin to see an improvement in your mood
although you might feel there is an improvement in your anxiety symptoms before then. It is important
that you keep taking these capsules or tablets until your doctor tells you to stop.
If you take more Thaden Capsules or Tablets than you should
You should only ever take the number of capsules or tablets that your doctor has told you to take. Do not
change the dose yourself if you think your capsules or tablets are not working well enough, speak to your
doctor to see if the dose can be increased.
Thaden may seriously harm you and may be life threatening if you take too many capsules or tablets. You
should SEEK IMMEDIATE HELP if a child takes any capsules or tablets or if you or anybody else
accidently takes too many capsules or tablets. The main symptoms of over dose are unconsciousness,
convulsions, reduction in heart and lung function and life threatening heart rhythm disorders which may
even occur after apparent recovery. Remember to take the pack with you, even if its empty.
If you forget to take Thaden Capsules or Tablets
Do not worry. Simply leave out that dose completely and then take your next dose at the right time. Do
not take a double dose to make up for the forgotten dose. If you are unsure, check again with your doctor
or pharmacist.
If you stop taking Thaden Capsules or Tablets
Do not stop taking Thaden just because you feel better. If you stop taking Thaden too soon, your
condition may get worse. Withdrawal symptoms may include insomnia, irritability, headache, nausea,
giddiness, panic-anxiety, restlessness and increased sweating. If your doctor wants you to stop taking
Thaden, your doctor will ask you to stop gradually.
4. Possible side effects
Like all medicines, Thaden Capsules and Tablets can cause side effects, although not everybody gets
If you get any of the following rare side effects (that affect less than 1 person in 1000) after taking
these capsules or tablets, you should contact your doctor immediately:
 yellowing of the skin or whites of the eyes (jaundice)
 hepatitis (damage to the liver causing dark urine, jaundice, nausea and fever)
 a fever (high temperature, sweating, shivering)
 discomfort around the right lower rib cage
 changes in blood including bone marrow (these will be found if you have blood test)
 severe mood changes such as extreme excitability
 fits

The most common side effects (that affect less than 1 person in 10)
 dry mouth
 blurred vision
 changes in heart beat or hear conduction
 constipation and difficulty in passing water
 increased appetite
 weight gain or weight loss
These side effects usually lessen as treatment continues.
Other side effects you may also experience are:
 drowsiness
 increased sweating
 skin rashes, including itchy rashes and hives tremor (shaking)
 changes in sexual function
 low blood pressure, which may cause dizziness or fainting
 an allergic reaction (e.g skin sensitivity to light, itching, redness)
 confusion
 changes in levels of sugar and sodium in the blood (seen in blood tests)
 enlargement of the testicles
 swelling of the breasts in men
 milk production in the breasts not related to pregnancy or breast feeding
 impairment of movement
 abnormal body movements
 delusions (abnormal thoughts)
 nervousness
 seizures
 speech difficulties
 dizziness
 raised blood pressure
 nausea and vomiting
 weakness
 tiredness
An increased risk of bone fractures has been observed in patients taking this type of medicine
Reporting of side effects
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects
not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at:
By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store Thaden Capsules and Tablets
Do not store above 25°C. Keep the capsules and tablets in the original container, and in a safe place
(preferable a locked cupboard) where children cannot see or reach them. Your medicine could
seriously harm them.

Do not take this product after the expiry date shown on the carton.
If your doctor decides to stop the treatment, you must return any leftover capsules or tablets to your
pharmacist. Only keep the capsules or tablets your doctor tells you to.
6. Contents of the pack and other information
What Thaden Capsules and Tablets contain:
The active substance is dosulepin hydrochloride. Each capsule contains 25mg of dosulepin
hydrochloride and each tablet contains 75mg of dosulepin hydrochloride,
The other ingredients in the capsules are lactose, maize starch and magnesium stearate. The capsule
shell contains gelatin and the colours ponceau 4R (E124), titanium dioxide (E171) and yellow iron
oxide (E172). The ink on the capsule contains titanium dioxide (E171), shellac and dimethicone.
The other ingredients in the tablets are tricalcium phosphate, maize starch, povidone, magnesium
stearate, purified water, hypromellose, macrogol 400, and colours sunset yellow (E110), ponceau 4R
(E124), indigo carmine (E132) and titanium dioxide (E171).
What Thaden Capsules and Tablets look like and contents of the pack
Thaden 25mg Capsules are red and have “TH” and “25” printed on them with white ink.
Thaden 75mg Tablets are round with a red shiny coating and are marked with “PTN 75” on one side
Thaden Capsules and Tablets are provided in packs of 14 or 28 capsules or tablets.
Marketing Authorisation Holder

Co-Pharma Limited
Unit 4, Metro Centre,
Tolpits Lane, Watford, Herts,
WD18 9SS, UK

This leaflet was last amended in May 2015.

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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.