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Jalyn Side Effects

Generic Name: dutasteride / tamsulosin

Note: This page contains information about the side effects of dutasteride / tamsulosin. Some of the dosage forms included on this document may not apply to the brand name Jalyn.

For the Consumer

Applies to dutasteride / tamsulosin: oral capsule

In addition to its needed effects, some unwanted effects may be caused by dutasteride / tamsulosin. In the event that any of these side effects do occur, they may require medical attention.

Major Side Effects

You should check with your doctor immediately if any of these side effects occur when taking dutasteride / tamsulosin:

More common:
  • Chills
  • cold sweats
  • confusion
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
Less common:
  • Chest pain
  • cough or hoarseness
  • fever
  • lower back or side pain
  • painful or difficult urination
Incidence not known:
  • Blistering, flaking, or peeling of the skin
  • blurred vision
  • difficulty with breathing
  • fast, irregular, pounding, or racing heartbeat or pulse
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • pain or swelling of the treated skin
  • painful or prolonged erection of the penis
  • shortness of breath
  • sweating
  • unusual tiredness or weakness

Minor Side Effects

Some of the side effects that can occur with dutasteride / tamsulosin may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

More common:
  • Change or problem with discharge of semen
  • decreased interest in sexual intercourse
  • dizziness
  • enlarged and painful breasts
  • inability to have or keep an erection
  • loss in sexual ability, desire, drive, or performance
Less common:
  • Back pain
  • body aches or pain
  • congestion
  • diarrhea
  • dryness or soreness of the throat
  • headache
  • increased cough
  • lack or loss of strength
  • pain or tenderness around the eyes and cheekbones
  • runny nose
  • shortness of breath or troubled breathing
  • sleepiness or unusual drowsiness
  • sleeplessness
  • sneezing
  • stuffy nose
  • tender, swollen glands in the neck
  • tightness of the chest or wheezing
  • trouble sleeping
  • trouble with swallowing
  • unable to sleep
  • voice changes
Incidence not known:
  • Constipation
  • hives or welts
  • itching
  • redness of the skin
  • skin rash
  • vomiting

For Healthcare Professionals

Applies to dutasteride / tamsulosin: oral capsule


Genitourinary side effects have included ejaculation disorders, impotence, decreased libido, priapism and breast disorders.

Postmarketing genitourinary side effects include testicular pain and swelling.[Ref]

Nervous system

Nervous system side effects have included dizziness, asthenia, somnolence and insomnia.[Ref]


Cardiovascular side effects have included chest pain, orthostatic hypotension, and palpitations.[Ref]


Gastrointestinal side effects have included diarrhea, constipation and vomiting.[Ref]


Immunologic side effects have included hypersensitivity reactions, including rash, urticaria, pruritus, angioedema, localized edema, serious skin reactions, and respiratory problems.[Ref]


Ocular side effects have included a variant of small pupil syndrome known as Intraoperative floppy iris syndrome (IFIS) during cataract surgery.[Ref]


General side effects have included infection.[Ref]


Respiratory side effects have included rhinitis, pharyngitis, increased cough and sinusitis.[Ref]


Musculoskeletal side effects have included back pain.[Ref]


Postmarketing psychiatric side effects have included depressed mood.


1. "Product Information. Jalyn (dutasteride-tamsulosin)." GlaxoSmithKline, Research Triangle Park, NC.

Not all side effects for Jalyn may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.