side effect vs side-effect

Some examples from the web:

• A side effect of all western diabetes medications.
• An unfortunate side effect of the treatment.
• Dizziness is an uncommon side effect of Siklos.
• Acne is an uncommon side effect.
• If side effect occurs, treatment should be discontinued.
• Another charming human side effect you stuck me with.
• Could be a pharmaceutical side effect.
• A major side effect is exhaustion and a desire to sleep.
• Disturbed r.E.M. Patterns are common side effect of fear.
• Notable side effect, green urine.
• Nothing. Just another tragic side effect from taking that cure.
• It can be a side effect of a statin.
• That must be a side effect of your incredible speed.
• The killings were an undesired side effect of his experiment gone disastrously wrong.
• I-In rare cases, a side effect of donepezil hydrochloride is reduced bone density and increased bone fracturing.
• Could have been the side effect of the anesthetic.
• It's a side effect of increased cranial pressure.
• Depression's not a side effect of cancer.
• It's a side effect of dying.
• If you experience an allergic side effect following administration of Elaprase, you should contact your doctor immediately.

Some examples from the web:

• Anosmia isn't a side-effect of IV imipenem.
• No side-effect has been observed following administration of 10 times the recommended dose of vaccine.
• Last year in the Netherlands, this had an unfortunate side-effect.
• It's a side-effect of what I have to do in order to survive.
• Hallucinations are known as a side-effect of treatment with dopamine agonists and levodopa.
• A very common side-effect (likely to occur in more than 1 in 10 patients) is feeling sick.
• The side-effect of the Barometz is severe bleeding.
• A further negative side-effect of the regulatory climate is a lack of readiness.
• This situation is an unwarranted side-effect and a result of the liberalisation pursued by the WTO.
• You are a side-effect to an evolutionary process... that cares little for individual lives.
• So, Dr. Levinson thinks it's just a short term side-effect from upping his meds.
• This is in principle a regrettable side-effect of the creation of this kind of supplementary structures.
• This could be described as a welcome side-effect of the entry hurdles to our market.
• (BANGING TABLE) Genocide is a side-effect?
• Hallucinations Hallucinations are known as a side-effect of treatment with dopamine agonists and levodopa.
• Is this a... side-effect of the day-glo clams?
• There is, however, also a significant part of VAT evasion that occurs as a side-effect of the VAT arrangements put in place when the single market was introduced in 1993.
• JPEG image saver (passes the buffer through, saves as a side-effect)
• Perhaps this was a side-effect of the ban on the use of phthalates introduced at the end of 1999.
• It is gratifying that we in the European Union are prepared to take the lead to tackle that worldwide problem and deal with such a wasteful side-effect of the fishing industry.