Anafranil Side Effects: What You Need to Know

Anafranil (Clomipramine) is a tricyclic antidepressant (TCA) primarily prescribed for obsessive-compulsive disorder (OCD). Like all medications in this class, it comes with a range of potential side effects — some mild and manageable, others that require immediate medical attention.

Understanding what to expect can help you feel more prepared and know when something needs your doctor's attention.

What Is Anafranil?

Anafranil is the brand name for Clomipramine Hydrochloride, a tricyclic antidepressant that works primarily by blocking the reuptake of serotonin in the brain. It's the most serotonin-selective TCA available, which is why it's uniquely effective for OCD. It's FDA-approved for OCD in patients aged 10 and older.

For a deeper look at how it works, see our guide on Anafranil's mechanism of action.

Common Side Effects

Most people who take Anafranil will experience some side effects, especially during the first few weeks as their body adjusts. These are generally not dangerous but can be uncomfortable:

• Drowsiness and sedation — One of the most common effects. It often improves after the first few weeks. Taking your dose at bedtime can help.
• Dry mouth — Very common with TCAs. Staying hydrated, chewing sugar-free gum, and using saliva substitutes can help.
• Constipation — Due to anticholinergic effects. Increasing fiber and water intake usually helps.
• Dizziness — Especially when standing up quickly (orthostatic hypotension). Rise slowly from sitting or lying positions.
• Tremor — Mild shaking, particularly in the hands, is reported frequently.
• Weight gain — Some patients gain weight over time on Anafranil. Monitoring diet and staying active can help manage this.
• Sexual dysfunction — Decreased libido, difficulty with ejaculation, and impotence are commonly reported. This is one of the most frequent reasons patients consider switching medications.
• Sweating/diaphoresis — Excessive sweating, sometimes including night sweats.
• Nausea — Usually improves with time. Taking Anafranil with food can reduce stomach upset.
• Fatigue — General tiredness beyond just drowsiness.
• Blurred vision — Another anticholinergic effect that typically improves over time.
• Urinary retention — Difficulty starting or completing urination. More common in older adults.

Many of these side effects are dose-related — meaning they may be worse at higher doses. Your doctor will typically start you at 25 mg daily and increase slowly to minimize these effects.

Serious Side Effects

While less common, these side effects require prompt medical attention. Contact your doctor or go to the emergency room if you experience any of the following:

• Seizures — Anafranil lowers the seizure threshold, and the risk increases with higher doses. The maximum recommended dose is 250 mg/day partly for this reason. If you have a history of seizures, tell your doctor before starting.
• Serotonin syndrome — A potentially life-threatening condition caused by too much serotonin. Symptoms include agitation, confusion, rapid heart rate, high blood pressure, dilated pupils, muscle twitching, and high fever. Risk is highest when Anafranil is combined with other serotonergic medications.
• Heart rhythm changes (QT prolongation) — Anafranil can affect your heart's electrical activity. Symptoms may include palpitations, fainting, or irregular heartbeat. Your doctor may order an EKG before and during treatment.
• Orthostatic hypotension — Severe drops in blood pressure when standing, which can cause falls. Particularly concerning in elderly patients.
• Liver problems (hepatotoxicity) — Signs include yellowing of the skin or eyes (jaundice), dark urine, or severe abdominal pain.
• Bone marrow suppression — Rare but serious. Watch for unexplained fever, sore throat, or unusual bruising/bleeding.
• Suicidal thoughts and behavior — Anafranil carries an FDA boxed warning about increased risk of suicidal thinking in children, adolescents, and young adults (ages 18-24), especially during the first few weeks of treatment or dose changes. Report any new or worsening depression, anxiety, agitation, or thoughts of self-harm immediately.
• Angle-closure glaucoma — Sudden eye pain, vision changes, nausea, and seeing halos around lights. This is a medical emergency.

Side Effects in Specific Populations

Children and Adolescents (Ages 10+)

While Anafranil is FDA-approved for OCD in children 10 and older, younger patients may be more sensitive to side effects, particularly:

• Increased risk of suicidal thoughts (boxed warning applies)
• More pronounced sedation
• Weight gain concerns during development

The maximum dose for children is 3 mg/kg/day or 200 mg/day, whichever is less.

Elderly Patients

Older adults are more susceptible to:

• Orthostatic hypotension and falls
• Anticholinergic effects (confusion, urinary retention, constipation)
• Cardiac effects

Lower starting doses and slower titration are typically recommended.

Pregnancy and Breastfeeding

Anafranil is Pregnancy Category C — meaning animal studies have shown risk, and there aren't adequate studies in humans. It's generally used during pregnancy only if the potential benefit justifies the risk. Clomipramine is excreted in breast milk and is not recommended during breastfeeding.

How to Manage Common Side Effects

Here are practical strategies that can help:

• Take it at bedtime — After the initial titration period (where you may take divided doses with meals), your doctor may switch you to a single bedtime dose. This helps with drowsiness and sedation.
• Take it with food — Reduces nausea and GI upset, especially during the titration period.
• Stay hydrated — Helps with dry mouth, constipation, and sweating.
• Rise slowly — Get up gradually from sitting or lying down to prevent dizziness.
• Increase fiber — Combat constipation with high-fiber foods, fruits, and vegetables.
• Exercise regularly — Can help manage weight gain, fatigue, and improve overall well-being.
• Don't stop suddenly — Abruptly stopping Anafranil can cause withdrawal symptoms including nausea, headache, and irritability. Always taper under your doctor's guidance.

When to Call Your Doctor

Call your doctor if you experience:

• New or worsening depression, anxiety, or suicidal thoughts
• Seizures or convulsions
• Rapid heartbeat, fainting, or palpitations
• High fever, confusion, or muscle rigidity (possible serotonin syndrome)
• Yellowing of the eyes or skin
• Unexplained bruising or bleeding
• Severe dizziness or falls
• Eye pain or sudden vision changes

If you're having a medical emergency, call 911 or go to your nearest emergency room.

Final Thoughts

Anafranil is an effective medication for OCD, but like all tricyclic antidepressants, it comes with a meaningful side effect profile. Many common side effects improve over time or can be managed with simple strategies. The serious side effects are less common but important to recognize.

The key is staying in close communication with your prescriber, especially during the first few weeks of treatment and any dose changes. Don't hesitate to report anything that feels off.

If you're currently taking Anafranil and need help finding it in stock, Medfinder can help you locate a pharmacy with availability near you.